diff --git a/.gitlab/ci/pcp-ballistics-service.yml b/.gitlab/ci/pcp-ballistics-service.yml
index 7c337a2..abee5d4 100644
--- a/.gitlab/ci/pcp-ballistics-service.yml
+++ b/.gitlab/ci/pcp-ballistics-service.yml
@@ -95,7 +95,7 @@ variables:
 
 ballistics:test:
   stage: test
-  image: repo.nstart.cloud/library/gradle:jdk17-ubi10
+  image: repo.nstart.cloud/library/gradle:jdk21-ubi10
   services:
     - name: repo.nstart.cloud/postgis/postgis:16-3.4
       alias: postgres
@@ -124,7 +124,7 @@ ballistics:test:
 
 ballistics:build:
   stage: build
-  image: repo.nstart.cloud/library/gradle:jdk17-ubi10
+  image: repo.nstart.cloud/library/gradle:jdk21-ubi10
   extends:
     - .ballistics:rules:build-and-image
     - .ballistics:gradle-cache