diff --git a/CHANGELOG.md b/CHANGELOG.md
index a72a7095..f7d7d18d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 * When looking for activities on device allow files next to device dir.
 ### Fixed
 * Test for mounting devices fails sometimes, because it was not ready for block device mounting.
+* Fix reading package version of already installed workoutizer package.
 
 ## [0.20.1](https://github.com/fgebhart/workoutizer/releases/tag/v0.20.1) - 2021-06-25
 ### Changed
diff --git a/workoutizer/__init__.py b/workoutizer/__init__.py
index 69b8143c..38b3e4da 100644
--- a/workoutizer/__init__.py
+++ b/workoutizer/__init__.py
@@ -1,21 +1,3 @@
-import os
-import subprocess
-from pathlib import Path
+import pkg_resources
 
-
-def _get_version() -> str:
-    cwd = Path.cwd()
-    os.chdir(Path(__file__).parent.parent)
-    try:
-        cmd = ["python", "-W", "ignore", "setup.py", "-V"]
-        out = subprocess.check_output(cmd, stderr=subprocess.DEVNULL)
-        if not isinstance(out, str):
-            out = out.decode("utf-8")
-        version = out.strip()
-    except Exception:
-        version = "unknown"
-    os.chdir(cwd)
-    return version
-
-
-__version__ = _get_version()
+__version__ = pkg_resources.require("workoutizer")[0].version