diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index e22b165..3b0372e 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -24,7 +24,7 @@ steps:
   - task: CacheBeta@1
     displayName: 'cache Nim binaries'
     inputs:
-      key: NimBinaries | $(Agent.OS) | $(PLATFORM) | "$(Build.SourceBranchName)" | "v4"
+      key: NimBinaries | $(Agent.OS) | $(PLATFORM) | "$(Build.SourceBranchName)" | "v5"
       path: NimBinaries
 
   - task: CacheBeta@1