diff --git a/src/Dockerfile b/src/Dockerfile
index cec260d..7e24fc7 100644
--- a/src/Dockerfile
+++ b/src/Dockerfile
@@ -30,7 +30,7 @@ RUN chicken-install srfi-1 srfi-13 srfi-18 srfi-19 srfi-158 srfi-194 \
         sxml-transforms schematra \
         uri-common http-client medea intarweb \
         sql-null openssl postgresql crypto-tools \
-        hmac sha2 string-hexadecimal
+        hmac sha2 string-utils
 
 WORKDIR /var
 RUN mkdir nassella