diff --git a/doc/requirements.txt b/doc/requirements.txt
index 6061e1b6f5e8d4d6fb5224f43510fcfc38a18509..8c801cb0775d84314a0b7821cd595419419bd943 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -5,4 +5,5 @@ jupyter
 nbconvert
 nbsphinx
 pandas
-matplotlib
\ No newline at end of file
+matplotlib
+PCSAFTsuperanc
\ No newline at end of file