diff --git a/README.md b/README.md
index 5f067318..82496d8f 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,7 @@ Tested on Python 3.4, 3.5, 3.6, 3.7, Pypy3
 
 DeepDiff prefers to use Murmur3 for hashing. However you have to manually install Murmur3 by running:
 
-`pip install mmh3`
+`pip install 'deepdiff[murmur]'`
 
 Otherwise DeepDiff will be using SHA256 for hashing which is a cryptographic hash and is considerably slower.
 
diff --git a/setup.py b/setup.py
index b5f7b570..bc9ef194 100755
--- a/setup.py
+++ b/setup.py
@@ -43,6 +43,9 @@ def get_reqs(filename):
       long_description_content_type='text/markdown',
       install_requires=reqs,
       python_requires='>=3.4',
+      extras_require={
+          "murmur": ["mmh3"],
+      },
       classifiers=[
           "Intended Audience :: Developers",
           "Operating System :: OS Independent",