diff --git a/ci/alpine.sh b/ci/alpine.sh
index 63d7954..0e4ba0d 100755
--- a/ci/alpine.sh
+++ b/ci/alpine.sh
@@ -26,6 +26,7 @@ apk add \
 	attr-dev \
 	autoconf \
 	automake \
+	bash \
 	diffutils \
 	docbook-xml \
 	docbook-xsl \