diff --git a/layers/base.nix b/layers/base.nix
index 8e0e285ab607682e8248abf94eac64e479a064a0..45d3e1319ea191bc02a7d0008820510f192bcd70 100644
--- a/layers/base.nix
+++ b/layers/base.nix
@@ -22,7 +22,7 @@ in
   # compatible, in order to avoid breaking some software such as database
   # servers. You should change this only after NixOS release notes say you
   # should.
-  system.stateVersion = lib.mkDefault "19.09"; # Did you read the comment?
+  system.stateVersion = lib.mkDefault "20.09"; # Did you read the comment?
 
   # Is it worth to specify this where it is needed instead of configuring it globally? Not sure yet.
   nixpkgs.config.allowUnfree = true;