diff --git a/pkgs/triton-utils.nix b/pkgs/triton-utils.nix
index b9bd25f..573e952 100644
--- a/pkgs/triton-utils.nix
+++ b/pkgs/triton-utils.nix
@@ -1,13 +1,13 @@
-{ pkgs, ... }:
+{ pkgs, caCertVersion, ... }:
 pkgs.stdenv.mkDerivation {
   pname = "triton-utils";
-  version = "0.0.6";
+  version = caCertVersion;
   src = pkgs.lib.cleanSource ./.;
 
   installPhase = ''
     mkdir -p $out/bin $out/share/certs
     cd ./utils
-    cp ./cacert-2022-10-11.pem $out/share/certs
+    cp ./cacert-${caCertVersion}.pem $out/share/certs
     cp ./ttp.sh $out/bin
     cp ./unset-env.sh $out/bin
   '';
diff --git a/tritonshell.nix b/tritonshell.nix
index 966cd15..e816cb7 100644
--- a/tritonshell.nix
+++ b/tritonshell.nix
@@ -5,6 +5,7 @@ let
   dataCenters = tritonConfig.dataCenters;
   mantaDomain = tritonConfig.mantaDomain;
   tritonApiDomain = tritonConfig.tritonApiDomain;
+  caCertVersion = "2022-10-11";
 in
 {
   # devshell docs: https://numtide.github.io/devshell/modules_schema.html
@@ -64,7 +65,7 @@ in
     # see overlay.nix
     docker-compose_1
     # shell scripts and utilities to set and unset triton environment variables
-    self.packages.${system}.triton-utils
+    self.packages.${system}.triton-utils { inherit caCertVersion; }
     self.packages.${system}.triton-docker-env
     # useful for working with JSON data
     bunyan-rs
@@ -77,7 +78,7 @@ in
     # see: https://github.com/joyent/triton-docker-cli/issues/17
     {
       name = "CURL_CA_BUNDLE";
-      value = "${self.packages.${system}.triton-utils}/share/certs/cacert-2022-07-19.pem";
+      value = "${self.packages.${system}.triton-utils}/share/certs/cacert-${caCertVersion}.pem";
     }
     {
       name = "CONSUL_HTTP_ADDR";