diff --git a/requirements.txt b/requirements.txt
index 82cc6d9..00dac93 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,4 +5,4 @@ spacy==3.4.1
 grappa==0.1.12
 pytest==7.1.3
 requests==2.23.0
-PyYAML~=6.0
+PyYAML==6.0