diff --git a/build-all.sh b/build-all.sh
index f5ad5d2..df4decb 100755
--- a/build-all.sh
+++ b/build-all.sh
@@ -86,6 +86,7 @@ if [[ "$MODULE" == "module6" ]]
 then
   # ADD NEW MODULES HERE
   # (add new modules above the rest so you get quicker feedback if it fails)
+  build maven_module "core-java/collectionops"
   build maven_module "spring-boot/resttemplate"
   build_maven_module "spring-cloud/tracing"
   build_maven_module "core-java/versions"
diff --git a/core-java/collectionops/README.md b/core-java/collectionops/README.md
index 6b31423..ffca4ff 100644
--- a/core-java/collectionops/README.md
+++ b/core-java/collectionops/README.md
@@ -1,3 +1,3 @@
 # Related Blog Posts
 
-* [How to do heap dump analysis](https://reflectoring.io/create-analyze-heapdump/)
+* [Logical Operations Between Java Collections](https://reflectoring.io/logical-ops-on-java-collections/)