diff --git a/Pipfile b/Pipfile
index d235388..a4ec28e 100644
--- a/Pipfile
+++ b/Pipfile
@@ -7,7 +7,7 @@ verify_ssl = true
 chardet = "==3.0.4"
 nose = "==1.3.7"
 tox = "==3.20.1"
-Cython = "==0.29.21"
+Cython = "==0.29.30"
 pylint = "==2.6.0"
 wheel = "==0.35.1"
 twine = "==3.2.0"
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 7853ef2..27dd7e0 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,7 +1,7 @@
 chardet==3.0.4
 nose==1.3.7
 tox==3.20.1
-Cython==0.29.21
+Cython==0.29.30
 # pylint==2.6.0
 # wheel==0.35.1
 # twine==3.2.0