diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index e96045e..e15abdd 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -24,9 +24,9 @@ env:
   WORKFLOW_VERSION_POSTGRESQL: '1' # for build steps related to the 'cachePostgres' cache
 
   # Software versions. 
-  POSTGRESQL_SOURCE_TAG: 'REL_17_STABLE'
+  POSTGRESQL_SOURCE_TAG: 'REL_18_STABLE'
   POSTGRESQL_PACKAGE_FILEID: '1259019'
-  OPENSSL_VERSION: '3_3_4'
+  OPENSSL_VERSION: '3_3_5'
   PKGCONFIGLITE_VERSION: '0.28-1'
   WINFLEXBISON_VERSION: '2.5.24'
   DIFFUTILS_VERSION: '2.8.7-1'
@@ -264,7 +264,7 @@ jobs:
       shell: cmd
       run: |
         echo on
-        sc config "postgresql-x64-14" start= auto
+        sc config "postgresql-x64-17" start= auto
     - name: get psqlodbc
       uses: actions/checkout@v4
       with: