diff --git a/.github/workflows/backend-ci.yml b/.github/workflows/backend-ci.yml
index 8007368..a7443cc 100644
--- a/.github/workflows/backend-ci.yml
+++ b/.github/workflows/backend-ci.yml
@@ -35,7 +35,7 @@ concurrency:
   cancel-in-progress: true
 
 env:
-  DOTNET_VERSION: "8.0.x"
+  DOTNET_VERSION: "9.0.x"
   BACKEND_SOLUTION_PATH: "src/backend"
   BACKEND_SOLUTION_FILE: "Backend.sln"
   WORKFLOW_SHORT_NAME: "backend-ci"
diff --git a/.github/workflows/deploy-cd.yml b/.github/workflows/deploy-cd.yml
index 401c8a3..06d66bc 100644
--- a/.github/workflows/deploy-cd.yml
+++ b/.github/workflows/deploy-cd.yml
@@ -33,7 +33,7 @@ on:
 env:
   GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
   TRAILING_AGENT_WORK_PATH: "/home/runner/work/test/test/"
-  DOTNET_VERSION: "8.0.x"
+  DOTNET_VERSION: "9.0.x"
   BACKEND_SOLUTION_PATH: "src/backend"
   BACKEND_SOLUTION_FILENAME: "Backend.sln"
   FRONTEND_PATH: "src/frontend"