diff --git a/.gitmodules b/.gitmodules
index b40a6f71..c7e6602f 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,4 +1,4 @@
 [submodule "extern/mqt-core"]
 	path = extern/mqt-core
     url = https://github.com/cda-tum/mqt-core.git
-    branch = main
+    branch = mem-opt-qfr-tw
diff --git a/extern/mqt-core b/extern/mqt-core
index 2b2675ea..2cd9ecfd 160000
--- a/extern/mqt-core
+++ b/extern/mqt-core
@@ -1 +1 @@
-Subproject commit 2b2675eac23b3b751db5ac6d7e13695e94e9d3d1
+Subproject commit 2cd9ecfdd02ed9755995497395e5ed5a8cc97dfd