diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index f97b79ee..514ae66b 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -126,7 +126,7 @@ jobs:
   ubuntu:
     strategy:
       matrix:
-        os: [ubuntu-16.04, ubuntu-18.04, ubuntu-20.04]
+        os: [ubuntu-18.04, ubuntu-20.04]
         ssllib: [mbedtls, openssl]
 
     runs-on: ${{matrix.os}}