diff --git a/docs/requirements.txt b/docs/requirements.txt
index ece6895..cfe73cc 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,18 +1,18 @@
-certifi==2018.11.29
-cycler==0.10.0
-kiwisolver==1.0.1
-matplotlib==3.0.3
-numpy==1.16.2
-pandas==0.24.1
-pyparsing==2.3.1
-python-dateutil==2.8.0
-pytz==2018.9
-scipy==1.2.1
-seaborn==0.9.0
-six==1.12.0
-tqdm==4.31.1
-wincertstore==0.2
-networkx==2.4
+certifi
+cycler
+kiwisolver
+matplotlib
+numpy
+pandas
+pyparsing
+python-dateutil
+pytz
+scipy
+seaborn
+six
+tqdm
+wincertstore
+networkx
 ipykernel
 sphinxcontrib-bibtex
 sphinxcontrib-svg2pdfconverter