diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index a03ca6f..436f013 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -5,7 +5,7 @@ jobs:
   test:
     strategy:
       matrix:
-        go-version: [1.18.x, 1.19.x]
+        go-version: [1.19.x]
         os: [ubuntu-latest, macos-latest, windows-latest]
     runs-on: ${{ matrix.os }}
     steps:
diff --git a/go.mod b/go.mod
index baeeafb..1f127ec 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/0x5a17ed/itkit
 
-go 1.18
+go 1.19
 
 require (
 	github.com/0x5a17ed/coro v1.0.0