diff --git a/requirements.txt b/requirements.txt
index ee88d43e..a07a7b5c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 PPCA>=0.0.2
-scikit-learn>=0.19.1,<0.22
+scikit-learn>=0.19.1,!=0.22
 pandas>=0.18.0
 seaborn>=0.8.1
 matplotlib>=1.5.1
@@ -9,4 +9,4 @@ future
 requests
 deepdish
 six
-# also requires umap-learn. However, due to a recent bug fix that has not been released on PyPI yet, umap-learn is installed from GitHub in setup.py
\ No newline at end of file
+# also requires umap-learn. However, due to a recent bug fix that has not been released on PyPI yet, umap-learn is installed from GitHub in setup.py