diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 64175585..3a50a6ce 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -24,7 +24,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        go-version: [1.18, 1.19]
+        go-version: ['1.19', '1.20']
       fail-fast: true
     steps:
       - name: Checkout
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index ed16696a..15e977ff 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -31,7 +31,7 @@ jobs:
       security-events: write
     strategy:
       matrix:
-        go-version: [1.18, 1.19]
+        go-version: ['1.19', '1.20']
       fail-fast: false
     steps:
       - name: Checkout repository
diff --git a/go.mod b/go.mod
index bd5d1cf1..a95501e2 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module oras.land/oras-go/v2
 
-go 1.18
+go 1.19
 
 require (
 	github.com/opencontainers/go-digest v1.0.0