diff --git a/interpreter.nix b/interpreter.nix
index ac24b5a..64acaef 100644
--- a/interpreter.nix
+++ b/interpreter.nix
@@ -1,7 +1,7 @@
 # python interpreter for dev environment
 let
   pkgs = import (import ./mach_nix/nix/nixpkgs-src.nix) { config = {}; };
-  python = pkgs.python37;
+  python = pkgs.python38;
   deps = (pkgs.lib.attrValues (import ./mach_nix/nix/python-deps.nix { inherit python; fetchurl = pkgs.fetchurl; }));
 in
 python.withPackages (ps: deps ++ [
diff --git a/mach_nix/nix/compileOverrides.nix b/mach_nix/nix/compileOverrides.nix
index e6c7cd9..f1af4ad 100644
--- a/mach_nix/nix/compileOverrides.nix
+++ b/mach_nix/nix/compileOverrides.nix
@@ -12,8 +12,8 @@ let
   nixpkgs_json = import ./nixpkgs-json.nix {
     inherit overrides pkgs python;
   };
-  builder_python = pkgs.pkgsBuildHost.python37.withPackages(ps:
-    (pkgs.lib.attrValues (import ./python-deps.nix {python = pkgs.python37; fetchurl = pkgs.fetchurl; }))
+  builder_python = pkgs.pkgsBuildHost.python38.withPackages(ps:
+    (pkgs.lib.attrValues (import ./python-deps.nix {python = pkgs.python38; fetchurl = pkgs.fetchurl; }))
   );
   src = ./../../.;
   db_and_fetcher = import ./deps-db-and-fetcher.nix {
diff --git a/mach_nix/nix/python.nix b/mach_nix/nix/python.nix
index ba249a5..90aa41f 100644
--- a/mach_nix/nix/python.nix
+++ b/mach_nix/nix/python.nix
@@ -4,7 +4,7 @@
 }:
 with pkgs;
 let
-  python = python37;
+  python = python38;
   python_deps = (lib.attrValues (import ./python-deps.nix { inherit python; fetchurl = fetchurl; }));
 in
 python.withPackages ( ps: python_deps )
diff --git a/shell.nix b/shell.nix
index 42a69f9..f572ae4 100644
--- a/shell.nix
+++ b/shell.nix
@@ -4,7 +4,7 @@
 }:
 with pkgs;
 let
-  python = python37;
+  python = python38;
   machnixDeps = (lib.attrValues (import ./mach_nix/nix/python-deps.nix { inherit python; fetchurl = fetchurl; }));
 in
 mkShell {