diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0d414e18..b0ac4dfa 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,7 +15,6 @@ jobs:
       fail-fast: false
       matrix:
         version:
-          - '1.6'
           - '1.7'
           - '1.8'
           - '1.9'