diff --git a/lambdas/preview/requirements.txt b/lambdas/preview/requirements.txt
index deaa3644510..dbb66babd04 100644
--- a/lambdas/preview/requirements.txt
+++ b/lambdas/preview/requirements.txt
@@ -1,5 +1,5 @@
 attrs==19.1.0
-bcbio_gff=0.7.1
+bcbio_gff==0.7.1
 beautifulsoup4==4.12.2
 biopython=1.84
 bleach==3.3.0