diff --git a/.github/workflows/release.yaml b/.github/workflows/release.yaml
index 5a58641..ca43342 100644
--- a/.github/workflows/release.yaml
+++ b/.github/workflows/release.yaml
@@ -20,7 +20,7 @@ jobs:
     - name: Setup Go
       uses: actions/setup-go@v4
       with:
-        go-version: 1.20.x
+        go-version: 1.21.x
 
     - name: Prepare release
       run: |
diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index 38a26a1..5f9165b 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -15,7 +15,7 @@ jobs:
   test:
     strategy:
       matrix:
-        go-version: [1.19.x, 1.20.x]
+        go-version: [1.20.x, 1.21.x]
         os: [ubuntu-latest]
     runs-on: ${{ matrix.os }}
     steps:
diff --git a/ci/test.sh b/ci/test.sh
index 8e57f4e..0f3fb6b 100755
--- a/ci/test.sh
+++ b/ci/test.sh
@@ -3,7 +3,7 @@
 
 set -euo pipefail
 
-if [[ $(go version) != *"go1.18"* ]]; then
+if [[ $(go version) != *"go1.21"* ]]; then
   exit 0
 fi
 
diff --git a/mockgen/internal/tests/generics/go.mod b/mockgen/internal/tests/generics/go.mod
index 0122445..18482fe 100644
--- a/mockgen/internal/tests/generics/go.mod
+++ b/mockgen/internal/tests/generics/go.mod
@@ -1,6 +1,6 @@
 module go.uber.org/mock/mockgen/internal/tests/generics
 
-go 1.19
+go 1.20
 
 require (
 	go.uber.org/mock v1.6.0
diff --git a/mockgen/internal/tests/typed/go.mod b/mockgen/internal/tests/typed/go.mod
index 831bf3b..8cfc50c 100644
--- a/mockgen/internal/tests/typed/go.mod
+++ b/mockgen/internal/tests/typed/go.mod
@@ -1,6 +1,6 @@
 module go.uber.org/mock/mockgen/internal/tests/typed
 
-go 1.18
+go 1.20
 
 replace go.uber.org/mock => ../../../..