diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index a6fd1acc..129caea4 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        distro: [debian_9, debian_10, debian_11, ubuntu_16, ubuntu_18, ubuntu_20, centos_7, centos_8, fedora_32, fedora_33]
+        distro: [debian_9, debian_10, debian_11, ubuntu_16, ubuntu_18, ubuntu_20, ubuntu_21, centos_7, centos_8, fedora_32, fedora_33]
     env:
       DISTRO: ${{matrix.distro}}
     steps:
diff --git a/supportedos.txt b/supportedos.txt
index c9332deb..1726cc93 100644
--- a/supportedos.txt
+++ b/supportedos.txt
@@ -1,5 +1,5 @@
 Raspbian=9,10
-Ubuntu=16,18,20
+Ubuntu=16,18,20,21
 Debian=9,10,11
 Fedora=32,33
 CentOS=7,8