diff --git a/ipyannotations/_version.py b/ipyannotations/_version.py
index ba1c970..ca480c1 100644
--- a/ipyannotations/_version.py
+++ b/ipyannotations/_version.py
@@ -4,5 +4,5 @@
 # Copyright (c) Jan Freyberg.
 # Distributed under the terms of the Modified BSD License.
 
-version_info = (0, 4, 2)
+version_info = (0, 5, 1)
 __version__ = ".".join(map(str, version_info))
diff --git a/setup.py b/setup.py
index 0360559..e8ecae5 100644
--- a/setup.py
+++ b/setup.py
@@ -95,7 +95,7 @@
     python_requires=">=3.7",
     install_requires=[
         "ipywidgets>=7.0.0",
-        "ipycanvas",
+        "ipycanvas>=0.13.1",
         "palettable",
         "Pillow",
         "numpy",
@@ -133,7 +133,7 @@
             # Any requirements for the examples to run
         ],
         "doc": [
-            "sphinx>=2.3",
+            "sphinx>=4.0",
             "sphinx_rtd_theme",
             "matplotlib",
             "nbsphinx",