diff --git a/snp_call.def b/snp_call.def
index 4b19e9d..b63fbca 100644
--- a/snp_call.def
+++ b/snp_call.def
@@ -27,7 +27,8 @@ dnf -y install \
     curl-devel \
     openssl-devel \
     ncurses-devel \
-    graphviz
+    graphviz \
+    python \
 
 APPS_ROOT=/sing_tools
 mkdir -p ${APPS_ROOT}