diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index 8941560ad..25648b205 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         os: [ macos-latest, ubuntu-latest]
-        go_vers: ['1.20']
+        go_vers: ['1.20', '1.21']
     steps:
       - uses: actions/checkout@v2
         with:
diff --git a/go.mod b/go.mod
index dfff32d12..f39d44d99 100644
--- a/go.mod
+++ b/go.mod
@@ -1,8 +1,7 @@
 module github.com/vektra/mockery/v2
 
-go 1.21
+go 1.19
 
-toolchain go1.21.0
 
 require (
 	github.com/chigopher/pathlib v0.19.1
diff --git a/pkg/fixtures/example_project/pkg_with_submodules/go.mod b/pkg/fixtures/example_project/pkg_with_submodules/go.mod
index 58a62e66b..f4e7eb87d 100644
--- a/pkg/fixtures/example_project/pkg_with_submodules/go.mod
+++ b/pkg/fixtures/example_project/pkg_with_submodules/go.mod
@@ -1,3 +1,3 @@
 module github.com/vektra/mockery/v2/pkg/fixtures/example_project/pkg_with_submodules
 
-go 1.21.0
+go 1.19
diff --git a/pkg/fixtures/example_project/pkg_with_submodules/subpkg/submodule/go.mod b/pkg/fixtures/example_project/pkg_with_submodules/subpkg/submodule/go.mod
index d6c3d108e..9d879cdb6 100644
--- a/pkg/fixtures/example_project/pkg_with_submodules/subpkg/submodule/go.mod
+++ b/pkg/fixtures/example_project/pkg_with_submodules/subpkg/submodule/go.mod
@@ -1,3 +1,3 @@
 module github.com/vektra/mockery/v2/pkg/fixtures/example_project/pkg_with_submodules/subpkg/submodule
 
-go 1.21.0
+go 1.19