diff --git a/public/languages/scheme/Dockerfile b/public/languages/scheme/Dockerfile
index cd911c7..1727a3a 100644
--- a/public/languages/scheme/Dockerfile
+++ b/public/languages/scheme/Dockerfile
@@ -6,6 +6,7 @@ RUN apt-get update && \
     apt-get install -y \
         guile-3.0 \
         guile-3.0-dev \
+        guile-json \
         curl \
         ca-certificates && \
     rm -rf /var/lib/apt/lists/*