diff --git a/pkgs/by-name/pr/prometheus/package.nix b/pkgs/by-name/pr/prometheus/package.nix
index 082dfcc2e044a..0018ed929d5f0 100644
--- a/pkgs/by-name/pr/prometheus/package.nix
+++ b/pkgs/by-name/pr/prometheus/package.nix
@@ -24,6 +24,7 @@
   enableOVHCloud ? true,
   enablePuppetDB ? true,
   enableScaleway ? true,
+  enableSTACKIT ? true,
   enableTriton ? true,
   enableUyuni ? true,
   enableVultr ? true,
@@ -127,6 +128,7 @@ buildGoModule (finalAttrs: {
     ${lib.optionalString enableOVHCloud "echo - github.com/prometheus/prometheus/discovery/ovhcloud"}
     ${lib.optionalString enablePuppetDB "echo - github.com/prometheus/prometheus/discovery/puppetdb"}
     ${lib.optionalString enableScaleway "echo - github.com/prometheus/prometheus/discovery/scaleway"}
+    ${lib.optionalString enableSTACKIT "echo - github.com/prometheus/prometheus/discovery/stackit"}
     ${lib.optionalString enableTriton "echo - github.com/prometheus/prometheus/discovery/triton"}
     ${lib.optionalString enableUyuni "echo - github.com/prometheus/prometheus/discovery/uyuni"}
     ${lib.optionalString enableVultr "echo - github.com/prometheus/prometheus/discovery/vultr"}
diff --git a/pkgs/by-name/pr/prometheus/source.nix b/pkgs/by-name/pr/prometheus/source.nix
index d112d1e2116ce..ebb82a9f48069 100644
--- a/pkgs/by-name/pr/prometheus/source.nix
+++ b/pkgs/by-name/pr/prometheus/source.nix
@@ -1,6 +1,6 @@
 {
-  version = "3.8.1";
-  hash = "sha256-mb1aMWpIELyZaqjYX1teYdtAK/+W9jzdPwzgbT7AVj4=";
-  npmDepsHash = "sha256-wmxvlQWQO2gP2apupMJssqAPr1ntWWIazduQU3AuodU=";
-  vendorHash = "sha256-35pVMl1Hu970BQE6jMzT1xaz/3FaIFWUtel0cl/uBdw=";
+  version = "3.9.1";
+  hash = "sha256-kqqWFvzEfpG+e+7ils9KE/RNs0eadLqrzMQJsSunQOM=";
+  npmDepsHash = "sha256-Z+EaIDQLgJ1YQ9tmGZLtvOVaDvZX1qeJJxsCAd/h41k=";
+  vendorHash = "sha256-CGec9hR/BpO3rXNGYm0V9AESsGIR6a0734e8t9oMOpA=";
 }