diff --git a/README.rst b/README.rst
index f54b107..91b8c3d 100644
--- a/README.rst
+++ b/README.rst
@@ -25,6 +25,11 @@ PennyLane ProjectQ Plugin
     :alt: PyPI - Python Version
     :target: https://pypi.org/project/PennyLane-pq
 
+\
+
+    **❗ This plugin will not be supported in newer versions of PennyLane. It is compatible with versions
+    of PennyLane up to and including 0.34❗**
+
 .. header-start-inclusion-marker-do-not-remove
 
 The PennyLane-ProjectQ plugin integrates the ProjectQ quantum computing library with PennyLane's
diff --git a/doc/index.rst b/doc/index.rst
index f67c93b..452222b 100644
--- a/doc/index.rst
+++ b/doc/index.rst
@@ -3,6 +3,11 @@ PennyLane-ProjectQ Plugin
 
 :Release: |release|
 
+.. warning::
+
+    This plugin will not be supported in newer versions of PennyLane. It is compatible with versions
+    of PennyLane up to and including 0.34.
+
 .. image:: _static/puzzle_pq.png
     :align: center
     :width: 70%
diff --git a/requirements.txt b/requirements.txt
index 01305a2..417de4b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,3 @@
 projectq>=0.5.1
-pennylane>=0.15
+pennylane>=0.15,<0.35
 pybind11
diff --git a/setup.py b/setup.py
index 6f1ef8b..1ca4fba 100644
--- a/setup.py
+++ b/setup.py
@@ -21,7 +21,7 @@
 
 requirements = [
     "projectq>=0.5.1",
-    "pennylane>=0.15"
+    "pennylane>=0.15,<0.35"
 ]  # pylint: disable=invalid-name