diff --git a/omop_vocab/scripts/load_omop_vocab.sh b/omop_vocab/scripts/load_omop_vocab.sh
index 6859fea..6acedfc 100644
--- a/omop_vocab/scripts/load_omop_vocab.sh
+++ b/omop_vocab/scripts/load_omop_vocab.sh
@@ -2,6 +2,7 @@
 
 set -e
 
+apk update
 apk add postgresql-client
 
 cd /tmp/files