diff --git a/.dep-versions b/.dep-versions
index d8d99a877c..8743f5c58d 100644
--- a/.dep-versions
+++ b/.dep-versions
@@ -10,7 +10,7 @@ enzyme=v0.0.203
 
 # For a custom PL version, update the package version here and at
 # 'doc/requirements.txt'
-pennylane=0.44.0-dev62
+pennylane = git+https://github.com/cvqmm/pennylane.git@optax_qsp_iter_solver
 
 # For a custom LQ/LK version, update the package version here and at
 # 'doc/requirements.txt'
diff --git a/Makefile b/Makefile
index c6addfa5a4..9ea70de44e 100644
--- a/Makefile
+++ b/Makefile
@@ -122,6 +122,7 @@ frontend:
 	# versions of a package with the same version tag (e.g. 0.38-dev0).
 	$(PYTHON) -m pip uninstall -y pennylane
 	$(PYTHON) -m pip install -e . --extra-index-url https://test.pypi.org/simple $(PIP_VERBOSE_FLAG)
+	$(PYTHON) -m pip install git+https://github.com/cvqmm/pennylane.git@optax_qsp_iter_solver
 	rm -r frontend/pennylane_catalyst.egg-info
 
 .PHONY: mlir llvm stablehlo enzyme dialects runtime oqc
diff --git a/doc/requirements.txt b/doc/requirements.txt
index e93ea33a3c..bbace9a567 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -33,4 +33,4 @@ lxml_html_clean
 --extra-index-url https://test.pypi.org/simple/
 pennylane-lightning-kokkos==0.44.0-dev16
 pennylane-lightning==0.44.0-dev16
-pennylane==0.44.0-dev62
+pennylane @ git+https://github.com/cvqmm/pennylane.git@optax_qsp_iter_solver