diff --git a/.github/workflows/autodoc.yml b/.github/workflows/autodoc.yml
index 6460d1e59..4e747f824 100644
--- a/.github/workflows/autodoc.yml
+++ b/.github/workflows/autodoc.yml
@@ -13,7 +13,7 @@ jobs:
     if: github.event.pull_request.merged == true
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Process markdown files
         run: |
           find . -name '*.md' | xargs perl tools/autodoc.pl
diff --git a/.github/workflows/benchmark.yml b/.github/workflows/benchmark.yml
index 6f4b49a6c..793cc0448 100644
--- a/.github/workflows/benchmark.yml
+++ b/.github/workflows/benchmark.yml
@@ -13,7 +13,7 @@ jobs:
     name: "Test [ Go ${{ matrix.go }} / JSON Backend ${{ matrix.json_backend }} ]"
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Cache Go modules
         uses: actions/cache@v3
         with:
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3311e3944..29dba0b29 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,7 +15,7 @@ jobs:
     name: "Test [ Go ${{ matrix.go }} / Tags ${{ matrix.go_tags }} ]"
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Cache Go modules
         uses: actions/cache@v3
         with:
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index e9a65fd19..26cf4a6b4 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -40,7 +40,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
diff --git a/.github/workflows/dependabot.yml b/.github/workflows/dependabot.yml
index 984b4d6d8..de9619f51 100644
--- a/.github/workflows/dependabot.yml
+++ b/.github/workflows/dependabot.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - run: |
           make tidy
       - run: |
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 72fabee73..7ced60a76 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -5,7 +5,7 @@ jobs:
     name: lint
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/setup-go@v4
         with:
           go-version: 1.19
diff --git a/.github/workflows/smoke.yml b/.github/workflows/smoke.yml
index 6e4fad8f5..d88341df2 100644
--- a/.github/workflows/smoke.yml
+++ b/.github/workflows/smoke.yml
@@ -18,7 +18,7 @@ jobs:
     name: "Smoke [ Go ${{ matrix.go }} / Tags ${{ matrix.go_tags }} ]"
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Check documentation generator
         run: |
           find . -name '*.md' | xargs env AUTODOC_DRYRUN=1 perl tools/autodoc.pl
diff --git a/deps.bzl b/deps.bzl
index fa850553b..b5b43e6f1 100644
--- a/deps.bzl
+++ b/deps.bzl
@@ -122,8 +122,8 @@ def go_dependencies():
         name = "org_golang_x_crypto",
         build_file_proto_mode = "disable_global",
         importpath = "golang.org/x/crypto",
-        sum = "h1:tFM/ta59kqch6LlvYnPa0yx5a83cL2nHflFhYKvv9Yk=",
-        version = "v0.12.0",
+        sum = "h1:mvySKfSWJ+UKUii46M40LOvyWfN0s2U+46/jDd0e6Ck=",
+        version = "v0.13.0",
     )
     go_repository(
         name = "org_golang_x_mod",
@@ -152,23 +152,23 @@ def go_dependencies():
         name = "org_golang_x_sys",
         build_file_proto_mode = "disable_global",
         importpath = "golang.org/x/sys",
-        sum = "h1:eG7RXZHdqOJ1i+0lgLgCpSXAp6M3LYlAo6osgSi0xOM=",
-        version = "v0.11.0",
+        sum = "h1:CM0HF96J0hcLAwsHPJZjfdNzs0gftsLfgKt57wWHJ0o=",
+        version = "v0.12.0",
     )
     go_repository(
         name = "org_golang_x_term",
         build_file_proto_mode = "disable_global",
         importpath = "golang.org/x/term",
-        sum = "h1:F9tnn/DA/Im8nCwm+fX+1/eBwi4qFjRT++MhtVC4ZX0=",
-        version = "v0.11.0",
+        sum = "h1:/ZfYdc3zq+q02Rv9vGqTeSItdzZTSNDmfTi0mBAuidU=",
+        version = "v0.12.0",
     )
 
     go_repository(
         name = "org_golang_x_text",
         build_file_proto_mode = "disable_global",
         importpath = "golang.org/x/text",
-        sum = "h1:k+n5B8goJNdU7hSvEtMUz3d1Q6D/XW4COJSJR6fN0mc=",
-        version = "v0.12.0",
+        sum = "h1:ablQoSUd0tRdKxZewP80B+BaqeKJuVhuRxj/dkrun3k=",
+        version = "v0.13.0",
     )
     go_repository(
         name = "org_golang_x_tools",
diff --git a/examples/go.mod b/examples/go.mod
index 867076a18..738e61809 100644
--- a/examples/go.mod
+++ b/examples/go.mod
@@ -9,4 +9,4 @@ require (
 
 replace github.com/cloudflare/circl v1.0.0 => github.com/cloudflare/circl v1.0.1-0.20210104183656-96a0695de3c3
 
-replace github.com/lestrrat-go/jwx/v2 v2.0.11 => github.com/lestrrat-go/jwx/v2 v2.0.12-0.20230824024517-a077c65f16eb
+replace github.com/lestrrat-go/jwx/v2 v2.0.11 => ../
\ No newline at end of file
diff --git a/examples/go.sum b/examples/go.sum
index 480afbf86..8bdc85cf3 100644
--- a/examples/go.sum
+++ b/examples/go.sum
@@ -38,8 +38,8 @@ github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5t
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
 golang.org/x/crypto v0.3.1-0.20221117191849-2c476679df9a/go.mod h1:hebNnKkNXi2UzZN1eVRvBB7co0a+JxK6XbPiWVs/3J4=
-golang.org/x/crypto v0.12.0 h1:tFM/ta59kqch6LlvYnPa0yx5a83cL2nHflFhYKvv9Yk=
-golang.org/x/crypto v0.12.0/go.mod h1:NF0Gs7EO5K4qLn+Ylc+fih8BSTeIjAP05siRnAh98yw=
+golang.org/x/crypto v0.13.0 h1:mvySKfSWJ+UKUii46M40LOvyWfN0s2U+46/jDd0e6Ck=
+golang.org/x/crypto v0.13.0/go.mod h1:y6Z2r+Rw4iayiXXAIxJIDAJ1zMW4yaTpebo8fPOliYc=
 golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
 golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
@@ -61,21 +61,21 @@ golang.org/x/sys v0.2.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.3.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.8.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.11.0 h1:eG7RXZHdqOJ1i+0lgLgCpSXAp6M3LYlAo6osgSi0xOM=
-golang.org/x/sys v0.11.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.12.0 h1:CM0HF96J0hcLAwsHPJZjfdNzs0gftsLfgKt57wWHJ0o=
+golang.org/x/sys v0.12.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
 golang.org/x/term v0.2.0/go.mod h1:TVmDHMZPmdnySmBfhjOoOdhjzdE1h4u1VwSiw2l1Nuc=
 golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
 golang.org/x/term v0.8.0/go.mod h1:xPskH00ivmX89bAKVGSKKtLOWNx2+17Eiy94tnKShWo=
-golang.org/x/term v0.11.0/go.mod h1:zC9APTIj3jG3FdV/Ons+XE1riIZXG4aZ4GTHiPZJPIU=
+golang.org/x/term v0.12.0/go.mod h1:owVbMEjm3cBLCHdkQu9b1opXd4ETQWc3BhuQGKgXgvU=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
 golang.org/x/text v0.4.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
 golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
 golang.org/x/text v0.9.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8=
-golang.org/x/text v0.12.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
+golang.org/x/text v0.13.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
diff --git a/examples/jwk_comparison_example_test.go b/examples/jwk_comparison_example_test.go
new file mode 100644
index 000000000..7f78f251f
--- /dev/null
+++ b/examples/jwk_comparison_example_test.go
@@ -0,0 +1,53 @@
+package examples
+
+import (
+	"crypto/rand"
+	"crypto/rsa"
+	"fmt"
+
+	"github.com/lestrrat-go/jwx/v2/jwk"
+)
+
+func ExampleJWK_Comparison() {
+	genKey := func() (jwk.Key, error) {
+		raw, err := rsa.GenerateKey(rand.Reader, 2048)
+		if err != nil {
+			return nil, fmt.Errorf("failed to generate new RSA private key: %s", err)
+		}
+
+		key, err := jwk.FromRaw(raw)
+		if err != nil {
+			return nil, fmt.Errorf("failed to create RSA key: %s", err)
+		}
+		if _, ok := key.(jwk.RSAPrivateKey); !ok {
+			return nil, fmt.Errorf("expected jwk.SymmetricKey, got %T", key)
+		}
+
+		return key, nil
+	}
+
+	k1, err := genKey()
+	if err != nil {
+		fmt.Printf("failed to generate key 1: %T", err)
+		return
+	}
+	k2, err := genKey()
+	if err != nil {
+		fmt.Printf("failed to generate key 2: %T", err)
+		return
+	}
+
+	// This comparison only compares Thumbprints of each key. It does NOT take into
+	// account fields that could differ even when thumbprints match. For example,
+	// it is totally possible to have a key with the same thumbprint, but different
+	// Key IDs, or key usages.
+	if jwk.Equal(k1, k2) {
+		fmt.Printf("k1 and k2 should be different")
+		return
+	}
+
+	if !jwk.Equal(k1, k1) {
+		fmt.Printf("k1 and k1 should be equal")
+		return
+	}
+}
diff --git a/examples/jwk_example_test.go b/examples/jwk_example_test.go
index 505ed2d6d..21804203a 100644
--- a/examples/jwk_example_test.go
+++ b/examples/jwk_example_test.go
@@ -27,7 +27,7 @@ func ExampleJWK_Usage() {
 		log.Printf("%s", jsonbuf)
 	}
 
-	for it := set.Iterate(context.Background()); it.Next(context.Background()); {
+	for it := set.Keys(context.Background()); it.Next(context.Background()); {
 		pair := it.Pair()
 		key := pair.Value.(jwk.Key)
 
diff --git a/go.mod b/go.mod
index c49dc1483..ea2f0a30b 100644
--- a/go.mod
+++ b/go.mod
@@ -11,5 +11,5 @@ require (
 	github.com/lestrrat-go/option v1.0.1
 	github.com/segmentio/asm v1.2.0
 	github.com/stretchr/testify v1.8.4
-	golang.org/x/crypto v0.12.0
+	golang.org/x/crypto v0.13.0
 )
diff --git a/go.sum b/go.sum
index 967b33243..ac6e2155e 100644
--- a/go.sum
+++ b/go.sum
@@ -32,8 +32,8 @@ github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXl
 github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
-golang.org/x/crypto v0.12.0 h1:tFM/ta59kqch6LlvYnPa0yx5a83cL2nHflFhYKvv9Yk=
-golang.org/x/crypto v0.12.0/go.mod h1:NF0Gs7EO5K4qLn+Ylc+fih8BSTeIjAP05siRnAh98yw=
+golang.org/x/crypto v0.13.0 h1:mvySKfSWJ+UKUii46M40LOvyWfN0s2U+46/jDd0e6Ck=
+golang.org/x/crypto v0.13.0/go.mod h1:y6Z2r+Rw4iayiXXAIxJIDAJ1zMW4yaTpebo8fPOliYc=
 golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
 golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
@@ -52,19 +52,19 @@ golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.8.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.11.0 h1:eG7RXZHdqOJ1i+0lgLgCpSXAp6M3LYlAo6osgSi0xOM=
-golang.org/x/sys v0.11.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.12.0 h1:CM0HF96J0hcLAwsHPJZjfdNzs0gftsLfgKt57wWHJ0o=
+golang.org/x/sys v0.12.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
 golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
 golang.org/x/term v0.8.0/go.mod h1:xPskH00ivmX89bAKVGSKKtLOWNx2+17Eiy94tnKShWo=
-golang.org/x/term v0.11.0/go.mod h1:zC9APTIj3jG3FdV/Ons+XE1riIZXG4aZ4GTHiPZJPIU=
+golang.org/x/term v0.12.0/go.mod h1:owVbMEjm3cBLCHdkQu9b1opXd4ETQWc3BhuQGKgXgvU=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
 golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
 golang.org/x/text v0.9.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8=
-golang.org/x/text v0.12.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
+golang.org/x/text v0.13.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
diff --git a/jwk/README.md b/jwk/README.md
index 85fb0a4b4..611585787 100644
--- a/jwk/README.md
+++ b/jwk/README.md
@@ -137,7 +137,7 @@ func ExampleJWK_Usage() {
     log.Printf("%s", jsonbuf)
   }
 
-  for it := set.Iterate(context.Background()); it.Next(context.Background()); {
+  for it := set.Keys(context.Background()); it.Next(context.Background()); {
     pair := it.Pair()
     key := pair.Value.(jwk.Key)
 
diff --git a/jwk/jwk.go b/jwk/jwk.go
index 8bb2910c7..5ad3b47de 100644
--- a/jwk/jwk.go
+++ b/jwk/jwk.go
@@ -508,3 +508,20 @@ type KeySpec struct {
 	RawFromKey ChainedRawFromKeyer
 	KeyFromRaw ChainedKeyFromRawer
 }
+
+// Equal compares two keys and returns true if they are equal. The comparison
+// is solely done against the thumbprints of k1 and k2. It is possible for keys
+// that have, for example, different key IDs, key usage, etc, to be considered equal.
+func Equal(k1, k2 Key) bool {
+	h := crypto.SHA256
+	tp1, err := k1.Thumbprint(h)
+	if err != nil {
+		return false // can't report error
+	}
+	tp2, err := k2.Thumbprint(h)
+	if err != nil {
+		return false // can't report error
+	}
+
+	return bytes.Equal(tp1, tp2)
+}
diff --git a/jwk/options.yaml b/jwk/options.yaml
index 3f7b6e2a1..6dfbded42 100644
--- a/jwk/options.yaml
+++ b/jwk/options.yaml
@@ -4,7 +4,7 @@ interfaces:
   - name: CacheOption
     comment: |
       CacheOption is a type of Option that can be passed to the
-      `jwk.Cache` object.
+      the `jwk.NewCache()` function.
   - name: AssignKeyIDOption
   - name: FetchOption
     methods:
@@ -13,8 +13,8 @@ interfaces:
       - registerOption
     comment: |
       FetchOption is a type of Option that can be passed to `jwk.Fetch()`
-      FetchOption also implements the `CacheOption`, and thus can
-      safely be passed to `(*jwk.Cache).Configure()`
+      FetchOption also implements the `RegisterOption`, and thus can
+      safely be passed to `(*jwk.Cache).Register()`
   - name: ParseOption
     methods:
       - fetchOption
diff --git a/jwk/options_gen.go b/jwk/options_gen.go
index 644b24711..2aac86fc6 100644
--- a/jwk/options_gen.go
+++ b/jwk/options_gen.go
@@ -25,7 +25,7 @@ type assignKeyIDOption struct {
 func (*assignKeyIDOption) assignKeyIDOption() {}
 
 // CacheOption is a type of Option that can be passed to the
-// `jwk.Cache` object.
+// the `jwk.NewCache()` function.
 type CacheOption interface {
 	Option
 	cacheOption()
@@ -38,8 +38,8 @@ type cacheOption struct {
 func (*cacheOption) cacheOption() {}
 
 // FetchOption is a type of Option that can be passed to `jwk.Fetch()`
-// FetchOption also implements the `CacheOption`, and thus can
-// safely be passed to `(*jwk.Cache).Configure()`
+// FetchOption also implements the `RegisterOption`, and thus can
+// safely be passed to `(*jwk.Cache).Register()`
 type FetchOption interface {
 	Option
 	fetchOption()