diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6bf5243..03ad6fb 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,7 +10,7 @@ jobs:
     strategy:
       max-parallel: 4
       matrix:
-        python-version: [3.6, 3.7, 3.8]
+        python-version: [3.6, 3.7, 3.8, pypy3]
 
     steps:
       - uses: actions/checkout@v2