diff --git a/book/src/tutorial/library/cli-with-library.md b/book/src/tutorial/library/cli-with-library.md
index 289a3df..0591186 100644
--- a/book/src/tutorial/library/cli-with-library.md
+++ b/book/src/tutorial/library/cli-with-library.md
@@ -7,9 +7,7 @@ Let's now use the library we created in our small CLI app.
 ```toml
 [dependencies]
 rustagram2 = "2"
-
-[dependencies.image-manipulation]
-path = "../image-manipulation"
+image-manipulation = { path = "../image-manipulation" }
 ```
 
 ✅ Recreate parts of the main function:
@@ -57,4 +55,4 @@ std::fs::write(output, manipulated_image).unwrap();
 
 Some ideas on what to do next:
 
-* Instead of unwrapping all errors, handle `Result` otherwise
\ No newline at end of file
+* Instead of unwrapping all errors, handle `Result` otherwise
diff --git a/book/src/tutorial/qt-gui/build-setup.md b/book/src/tutorial/qt-gui/build-setup.md
index acc1d21..96e78af 100644
--- a/book/src/tutorial/qt-gui/build-setup.md
+++ b/book/src/tutorial/qt-gui/build-setup.md
@@ -4,9 +4,20 @@ CXX-Qt provides helper libraries that make it easy for the Rust build system to
 
 The goal for now is to create a simple program that just launches an Qt/QML application.
 
-✅ Create a new Rust application
+✅ In the workspace create a new Rust application
+```console
+cargo new --bin qt-gui
+```
+
+✅ Add the new crate to the workspace
+```toml
+[workspace]
+members = ["cli", "image-manipulation", "qt-gui"]
+resolver = "2"
+```
+
+✅ Then enter our new crate
 ```console
-cargo new qt-gui
 cd qt-gui
 ```
 
@@ -27,7 +38,9 @@ ApplicationWindow {
 ✅ Add dependencies to the `Cargo.toml` file
 ```toml
 [dependencies]
-rustagram2="2"
+rustagram2="*"
+image-manipulation = { path = "../image-manipulation" }
+
 cxx="1.0.95"
 cxx-qt = { git="https://github.com/LeonMatthesKDAB/cxx-qt", branch="qimage" }
 cxx-qt-lib = { git="https://github.com/LeonMatthesKDAB/cxx-qt", branch="qimage" }
@@ -38,7 +51,7 @@ cxx-qt-build = { git="https://github.com/LeonMatthesKDAB/cxx-qt", branch="qimage
 ```
 
 ```diff
-- At the time of writing (15.11.2023), CXX-Qt 0.6 hasn't been released yet.
+- At the time of writing (17.11.2023), CXX-Qt 0.6 hasn't been released yet.
 - To keep the training material up-to-date with the new API introduced in version 0.6,
 - we'll use the version from Github for now.
 - The training material on Github will be updated as soon as version 0.6 is released!
@@ -53,7 +66,9 @@ cxx-qt-build = { git="https://github.com/LeonMatthesKDAB/cxx-qt", branch="qimage
 
 ```toml
 [dependencies]
-rustagram2="2"
+rustagram2="*"
+image-manipulation = { path = "../image-manipulation" }
+
 cxx="1.0.95"
 cxx-qt="0.6"
 cxx-qt-lib="0.6"
diff --git a/book/src/tutorial/qt-gui/qquickpainteditem.md b/book/src/tutorial/qt-gui/qquickpainteditem.md
index 8063ec6..bd231c7 100644
--- a/book/src/tutorial/qt-gui/qquickpainteditem.md
+++ b/book/src/tutorial/qt-gui/qquickpainteditem.md
@@ -29,10 +29,10 @@ Before you do anything else, make sure to
 
 Because we will be using the `#[cxx_qt::bridge]` macro, we have to register this file twice.
 
-1. In the `src/main.rs` file, add a line: `pub mod image_painter;`\
-    This registers the new file as a module of our application and makes it known to Cargo.
-2. In the `build.rs` file, add the file to the list of rust_files of the QmlModule.\
-    This registers the new file with CXX-Qt.
+1. ✅ In the `src/main.rs` file, add a line: `pub mod image_painter;`
+    * This registers the new file as a module of our application and makes it known to Cargo.
+2. ✅ In the `build.rs` file, add the file to the list of rust_files of the QmlModule.
+    * This registers the new file with CXX-Qt.\
     It tells CXX-Qt to generate a C++ class from it, run moc and link the resulting class into our application.
     This is only necessary because we want to use CXX-Qt within the file.
     Doing this second step is not necessary for a normal Rust module.
diff --git a/book/src/tutorial/qt-gui/rust-implementation.md b/book/src/tutorial/qt-gui/rust-implementation.md
index df9ec5f..365fb00 100644
--- a/book/src/tutorial/qt-gui/rust-implementation.md
+++ b/book/src/tutorial/qt-gui/rust-implementation.md
@@ -192,7 +192,7 @@ The resulting application should look like this:
 
 ![The final application, showing the picture of a skyline that has been filtered using the "lofi" filter](./qt-gui-skyline.png)
 
-✅ Check out the [full example code](https://github.com/ferrous-systems/qt-training-2023/tree/main/crates/qt-gui) and compare it with your implementation
+✅ Check out the [full example code](https://github.com/ferrous-systems/qt-training-2023/tree/main/crates/with-workspace/) and compare it with your implementation
 
 [QQuickPaintedItem]: https://doc.qt.io/qt-6/qquickpainteditem-members.html
 [CXX-Qt book]: https://docs.rs/cxx-qt-lib/latest/cxx_qt_lib/
diff --git a/crates/qt-gui-qquickpainteditem/Cargo.lock b/crates/qt-gui-qquickpainteditem/Cargo.lock
index 87904e6..cec4783 100644
--- a/crates/qt-gui-qquickpainteditem/Cargo.lock
+++ b/crates/qt-gui-qquickpainteditem/Cargo.lock
@@ -2,62 +2,6 @@
 # It is not intended for manual editing.
 version = 3
 
-[[package]]
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-
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-]
-
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-dependencies = [
- "hermit-abi",
- "libc",
- "winapi",
-]
-
-[[package]]
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-checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
-
-[[package]]
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-version = "0.10.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dc827186963e592360843fb5ba4b973e145841266c1357f7180c43526f2e5b61"
-
-[[package]]
-name = "bitflags"
-version = "1.3.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
-
-[[package]]
-name = "bytemuck"
-version = "1.14.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "374d28ec25809ee0e23827c2ab573d729e293f281dfe393500e7ad618baa61c6"
-
-[[package]]
-name = "byteorder"
-version = "1.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1fd0f2584146f6f2ef48085050886acf353beff7305ebd1ae69500e27c67f64b"
-
 [[package]]
 name = "cc"
 version = "1.0.83"
@@ -68,12 +12,6 @@ dependencies = [
  "libc",
 ]
 
-[[package]]
-name = "cfg-if"
-version = "1.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
-
 [[package]]
 name = "clang-format"
 version = "0.3.0"
@@ -83,21 +21,6 @@ dependencies = [
  "thiserror",
 ]
 
-[[package]]
-name = "clap"
-version = "2.34.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a0610544180c38b88101fecf2dd634b174a62eef6946f84dfc6a7127512b381c"
-dependencies = [
- "ansi_term",
- "atty",
- "bitflags",
- "strsim",
- "textwrap",
- "unicode-width",
- "vec_map",
-]
-
 [[package]]
 name = "codespan-reporting"
 version = "0.11.1"
@@ -108,12 +31,6 @@ dependencies = [
  "unicode-width",
 ]
 
-[[package]]
-name = "color_quant"
-version = "1.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3d7b894f5411737b7867f4827955924d7c254fc9f4d91a6aad6b097804b1018b"
-
 [[package]]
 name = "convert_case"
 version = "0.6.0"
@@ -123,54 +40,6 @@ dependencies = [
  "unicode-segmentation",
 ]
 
-[[package]]
-name = "crc32fast"
-version = "1.3.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b540bd8bc810d3885c6ea91e2018302f68baba2129ab3e88f32389ee9370880d"
-dependencies = [
- "cfg-if",
-]
-
-[[package]]
-name = "crossbeam-deque"
-version = "0.8.3"
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-checksum = "ce6fd6f855243022dcecf8702fef0c297d4338e226845fe067f6341ad9fa0cef"
-dependencies = [
- "cfg-if",
- "crossbeam-epoch",
- "crossbeam-utils",
-]
-
-[[package]]
-name = "crossbeam-epoch"
-version = "0.9.15"
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-checksum = "ae211234986c545741a7dc064309f67ee1e5ad243d0e48335adc0484d960bcc7"
-dependencies = [
- "autocfg",
- "cfg-if",
- "crossbeam-utils",
- "memoffset",
- "scopeguard",
-]
-
-[[package]]
-name = "crossbeam-utils"
-version = "0.8.16"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5a22b2d63d4d1dc0b7f1b6b2747dd0088008a9be28b6ddf0b1e7d335e3037294"
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-
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-
 [[package]]
 name = "cxx"
 version = "1.0.110"
@@ -298,97 +167,6 @@ version = "1.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a26ae43d7bcc3b814de94796a5e736d4029efb0ee900c12e2d54c993ad1a1e07"
 
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-source = "registry+https://github.com/rust-lang/crates.io-index"
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-dependencies = [
- "bit_field",
- "flume",
- "half",
- "lebe",
- "miniz_oxide",
- "rayon-core",
- "smallvec",
- "zune-inflate",
-]
-
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-version = "0.3.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "64d6dafc854908ff5da46ff3f8f473c6984119a2876a383a860246dd7841a868"
-dependencies = [
- "simd-adler32",
-]
-
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-version = "1.0.28"
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- "weezl",
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-name = "half"
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-dependencies = [
- "crunchy",
-]
-
-[[package]]
-name = "hermit-abi"
-version = "0.1.19"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "62b467343b94ba476dcb2500d242dadbb39557df889310ac77c5d99100aaac33"
-dependencies = [
- "libc",
-]
-
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-dependencies = [
- "bytemuck",
- "byteorder",
- "color_quant",
- "exr",
- "gif",
- "jpeg-decoder",
- "num-rational",
- "num-traits",
- "png",
- "qoi",
- "tiff",
-]
-
 [[package]]
 name = "indoc"
 version = "2.0.4"
@@ -413,21 +191,6 @@ dependencies = [
  "libc",
 ]
 
-[[package]]
-name = "jpeg-decoder"
-version = "0.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bc0000e42512c92e31c2252315bda326620a4e034105e900c98ec492fa077b3e"
-dependencies = [
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-
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-checksum = "03087c2bad5e1034e8cace5926dec053fb3790248370865f5117a7d0213354c8"
-
 [[package]]
 name = "libc"
 version = "0.2.150"
@@ -443,47 +206,18 @@ dependencies = [
  "cc",
 ]
 
-[[package]]
-name = "lock_api"
-version = "0.4.11"
-source = "registry+https://github.com/rust-lang/crates.io-index"
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-dependencies = [
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- "scopeguard",
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-
 [[package]]
 name = "memchr"
 version = "2.6.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f665ee40bc4a3c5590afb1e9677db74a508659dfd71e126420da8274909a0167"
 
-[[package]]
-name = "memoffset"
-version = "0.9.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5a634b1c61a95585bd15607c6ab0c4e5b226e695ff2800ba0cdccddf208c406c"
-dependencies = [
- "autocfg",
-]
-
 [[package]]
 name = "minimal-lexical"
 version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "68354c5c6bd36d73ff3feceb05efa59b6acb7626617f4962be322a825e61f79a"
 
-[[package]]
-name = "miniz_oxide"
-version = "0.7.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e7810e0be55b428ada41041c41f32c9f1a42817901b4ccf45fa3d4b6561e74c7"
-dependencies = [
- "adler",
- "simd-adler32",
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-
 [[package]]
 name = "nom"
 version = "7.1.3"
@@ -494,55 +228,12 @@ dependencies = [
  "minimal-lexical",
 ]
 
-[[package]]
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-dependencies = [
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 [[package]]
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 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dd8b5dd2ae5ed71462c540258bedcb51965123ad7e7ccf4b9a8cafaa4a63576d"
 
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-dependencies = [
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- "fdeflate",
- "flate2",
- "miniz_oxide",
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-
 [[package]]
 name = "proc-macro2"
 version = "1.0.69"
@@ -552,15 +243,6 @@ dependencies = [
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 ]
 
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-dependencies = [
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 [[package]]
 name = "qt-build-utils"
 version = "0.5.3"
@@ -579,7 +261,6 @@ dependencies = [
  "cxx-qt",
  "cxx-qt-build",
  "cxx-qt-lib",
- "rustagram2",
 ]
 
 [[package]]
@@ -591,75 +272,12 @@ dependencies = [
  "proc-macro2",
 ]
 
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 [[package]]
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 checksum = "a3cf7c11c38cb994f3d40e8a8cde3bbd1f72a435e4c49e85d6553d8312306152"
 
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-
 [[package]]
 name = "syn"
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@@ -680,15 +298,6 @@ dependencies = [
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 ]
 
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diff --git a/crates/with-workspace/Cargo.toml b/crates/with-workspace/Cargo.toml
index 0fbc1d8..ee4b267 100644
--- a/crates/with-workspace/Cargo.toml
+++ b/crates/with-workspace/Cargo.toml
@@ -1,3 +1,3 @@
 [workspace]
-members = ["cli", "image-manipulation"]
+members = ["cli", "image-manipulation", "qt-gui"]
 resolver = "2"
diff --git a/crates/with-workspace/cli/Cargo.toml b/crates/with-workspace/cli/Cargo.toml
index 6eba580..2600d85 100644
--- a/crates/with-workspace/cli/Cargo.toml
+++ b/crates/with-workspace/cli/Cargo.toml
@@ -7,6 +7,4 @@ edition = "2021"
 
 [dependencies]
 rustagram2 = "*"
-
-[dependencies.image-manipulation]
-path = "../image-manipulation"
+image-manipulation = { path = "../image-manipulation" }
diff --git a/crates/qt-gui/Cargo.lock b/crates/with-workspace/qt-gui/Cargo.lock
similarity index 100%
rename from crates/qt-gui/Cargo.lock
rename to crates/with-workspace/qt-gui/Cargo.lock
diff --git a/crates/qt-gui/Cargo.toml b/crates/with-workspace/qt-gui/Cargo.toml
similarity index 87%
rename from crates/qt-gui/Cargo.toml
rename to crates/with-workspace/qt-gui/Cargo.toml
index dde3fa9..878c99d 100644
--- a/crates/qt-gui/Cargo.toml
+++ b/crates/with-workspace/qt-gui/Cargo.toml
@@ -6,7 +6,9 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-rustagram2 = "2"
+rustagram2="*"
+image-manipulation = { path = "../image-manipulation" }
+
 cxx = "1.0.95"
 cxx-qt = { git = "https://github.com/LeonMatthesKDAB/cxx-qt", branch = "qimage" }
 cxx-qt-lib = { git = "https://github.com/LeonMatthesKDAB/cxx-qt", branch = "qimage" }
diff --git a/crates/qt-gui/build.rs b/crates/with-workspace/qt-gui/build.rs
similarity index 100%
rename from crates/qt-gui/build.rs
rename to crates/with-workspace/qt-gui/build.rs
diff --git a/crates/qt-gui/qml/main.qml b/crates/with-workspace/qt-gui/qml/main.qml
similarity index 100%
rename from crates/qt-gui/qml/main.qml
rename to crates/with-workspace/qt-gui/qml/main.qml
diff --git a/crates/qt-gui/src/image_painter.rs b/crates/with-workspace/qt-gui/src/image_painter.rs
similarity index 91%
rename from crates/qt-gui/src/image_painter.rs
rename to crates/with-workspace/qt-gui/src/image_painter.rs
index 56f895d..62ab31e 100644
--- a/crates/qt-gui/src/image_painter.rs
+++ b/crates/with-workspace/qt-gui/src/image_painter.rs
@@ -1,6 +1,7 @@
 use cxx_qt::{CxxQtType, Threading};
-use cxx_qt_lib::{QByteArray, QByteArrayCursor, QColor, QImage, QRectF, QString, QUrl};
-use rustagram::{image, FilterType, RustagramFilter};
+use cxx_qt_lib::{QByteArray, QColor, QImage, QRectF, QString, QUrl};
+use image_manipulation::apply_filter;
+use rustagram::FilterType;
 use std::{error::Error, pin::Pin};
 
 #[cxx_qt::bridge(cxx_file_stem = "image_painter")]
@@ -114,12 +115,12 @@ impl qobject::ImagePainter {
             .to_string()
             .parse()
             .unwrap_or(FilterType::NineTeenSeventySeven);
-        let image = image::open(path)?.apply_filter(filter);
+        let image = std::fs::read(path)?;
+        let image = apply_filter(&image, filter);
 
-        let mut bytes = QByteArrayCursor::new(QByteArray::default());
-        image.write_to(&mut bytes, image::ImageOutputFormat::Png)?;
+        let bytes = QByteArray::from(image.as_slice());
 
-        QImage::from_data(bytes.as_ref(), "PNG").ok_or("Failed to convert to QImage!".into())
+        QImage::from_data(&bytes, "PNG").ok_or("Failed to convert to QImage!".into())
     }
 
     fn load_file(mut self: Pin<&mut Self>) {
diff --git a/crates/qt-gui/src/main.rs b/crates/with-workspace/qt-gui/src/main.rs
similarity index 100%
rename from crates/qt-gui/src/main.rs
rename to crates/with-workspace/qt-gui/src/main.rs