diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index bbf1395..8c74353 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -12,7 +12,7 @@ jobs:
 
     runs-on: ubuntu-latest
     container:
-      image: crystallang/crystal:0.36.1-alpine
+      image: crystallang/crystal:1.0.0-alpine
 
     steps:
     - uses: actions/checkout@v2