diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index af017b0..7b543d0 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -15,3 +15,9 @@ nixos-20.03:
   script: NIX_PATH=channel:$NIXPKGS_CHANNEL nix-shell --run ./.gitlab-ci.sh
   variables:
     NIXPKGS_CHANNEL: nixos-20.03
+
+nixos-20.09:
+  stage: build
+  script: NIX_PATH=channel:$NIXPKGS_CHANNEL nix-shell --run ./.gitlab-ci.sh
+  variables:
+    NIXPKGS_CHANNEL: nixos-20.09
diff --git a/.travis.yml b/.travis.yml
index 1f8bb86..adc0930 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,6 +8,8 @@ matrix:
     env: NIXPKGS_CHANNEL=nixos-unstable IMAGE_TAG=latest
   - name: nixos-20.03
     env: NIXPKGS_CHANNEL=nixos-20.03
+  - name: nixos-20.09
+    env: NIXPKGS_CHANNEL=nixos-20.09
 
 script:
   - NIX_PATH=channel:$NIXPKGS_CHANNEL nix-shell --run ./.travis.sh
diff --git a/shell.nix b/shell.nix
index ff83b27..407ae45 100644
--- a/shell.nix
+++ b/shell.nix
@@ -1,5 +1,5 @@
 let
-  nixpkgs = builtins.fetchTarball "channel:nixos-20.03";
+  nixpkgs = builtins.fetchTarball "channel:nixos-20.09";
   pkgs = import nixpkgs { config = {}; overlays = []; };
 in
 with pkgs;