diff --git a/config/semaphores.yml b/config/semaphores.yml
index a976d91a2..e4d984e39 100644
--- a/config/semaphores.yml
+++ b/config/semaphores.yml
@@ -7,3 +7,4 @@ data:
   standardising: "2" # Limit of how many standardising workflow instances can run at the same time
   bulk: "4" # Limit of how many bulk workflow instances can run at the same time
   bulkcopy: "8" # Limit of how many publish-copy workflow instances can run at the same time
+  basemaps_import: "10" # Limit of how many basemaps import workflow instances can run at the same time
diff --git a/workflows/basemaps/imagery-import-cogify.yml b/workflows/basemaps/imagery-import-cogify.yml
index b49ed041b..3154e91e7 100644
--- a/workflows/basemaps/imagery-import-cogify.yml
+++ b/workflows/basemaps/imagery-import-cogify.yml
@@ -6,6 +6,11 @@ metadata:
 spec:
   parallelism: 100
   entrypoint: main
+  synchronization:
+    semaphore:
+      configMapKeyRef:
+        name: semaphores
+        key: basemaps_import
   templateDefaults:
     container:
       imagePullPolicy: Always