diff --git a/docs/requirements.txt b/docs/requirements.txt
index f89c076..cad92e3 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,4 +1,5 @@
 -r ../requirements.txt
+crispy_bootstrap4
 sphinx
 sphinx_rtd_theme==1.3.0
 readthedocs-sphinx-search==0.3.1
\ No newline at end of file