diff --git a/.github/actions/build-proxies/action.yml b/.github/actions/build-proxies/action.yml
index eb3d9b82..7ad6ec43 100644
--- a/.github/actions/build-proxies/action.yml
+++ b/.github/actions/build-proxies/action.yml
@@ -25,14 +25,16 @@ runs:
       run: |
         make publish-oas
 
-    - name: Setup Proxy Name
+    - name: Setup Proxy Name and target
       shell: bash
       run: |
 
         if [ -z $PR_NUMBER ]
         then
           echo "INSTANCE=$PROXYGEN_API_NAME" >> $GITHUB_ENV
+          echo "TARGET=https://suppliers.dev.nhsnotify.national.nhs.uk" >> $GITHUB_ENV
         else
+          echo "TARGET=https://pr$PR_NUMBER.suppliers.dev.nhsnotify.national.nhs.uk" >> $GITHUB_ENV
           echo "INSTANCE=$PROXYGEN_API_NAME-PR-$PR_NUMBER" >> $GITHUB_ENV
         fi
 
@@ -52,6 +54,11 @@ runs:
         envsubst < ./.github/proxygen-settings.yaml > ${HOME}/.proxygen/settings.yaml
         envsubst < ./.github/proxygen-settings.yaml | cat
 
+    - name: Set target
+      shell: bash
+      run: |
+        jq --arg newurl "$TARGET" '.["x-nhsd-apim"].target.url = $newurl' build/notify-supplier.json > build/notify-supplier_target.json && mv build/notify-supplier_target.json build/notify-supplier.json
+
 
     - name: Deploy to Internal Dev
       shell: bash