diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 684fcb2..38fa070 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -11,7 +11,8 @@ jobs:
 
     strategy:
       matrix:
-        python-version: [3.8, 3.9, '3.10']
+        python-version: [3.9, '3.10', '3.11']
+
 
     steps:
       - name: Cancel Previous Runs
diff --git a/.readthedocs.yml b/.readthedocs.yml
index a5c4557..9abaf52 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -19,9 +19,14 @@ formats:
 
 # Optionally set the version of Python and requirements required to build your docs
 python:
-  version: 3.8
   install:
     - requirements: doc/requirements.txt
+    - method: pip
+      path: .
 
 build:
-  image: latest
+  os: ubuntu-22.04
+  tools:
+    python: "3.9"
+  apt_packages:
+    - graphviz
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 77ba2cb..8b2c4f9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,9 @@
 
 ### Breaking changes
 
+* Support for Python 3.8 has been removed, and support for 3.11 has been added.
+  [(#55)](https://github.com/PennyLaneAI/pennylane-qulacs/pull/55)
+
 ### Improvements
 
 * Added support for `qml.StatePrep` as a state preparation operation. 
@@ -17,6 +20,7 @@
 
 This release contains contributions from (in alphabetical order):
 
+Mudit Pandey,
 Jay Soni
 
 ---
diff --git a/setup.py b/setup.py
index 018ed26..4133297 100644
--- a/setup.py
+++ b/setup.py
@@ -63,9 +63,9 @@
     "Programming Language :: Python",
     # Make sure to specify here the versions of Python supported
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3 :: Only",
     "Topic :: Scientific/Engineering :: Physics",
 ]