diff --git a/validation/Dockerfile b/validation/Dockerfile
index 1cd2da4701398345407d5577196ade6839d509bc..fb265fe3f0d4b865bdd899004ff4c2570a3762d1 100644
--- a/validation/Dockerfile
+++ b/validation/Dockerfile
@@ -78,7 +78,7 @@ COPY --chmod=755 validate-mmcif-file.py /usr/local/bin/validate-mmcif-file
 ## https://github.com/ihmwg/ModelCIF/blob/master/dist/mmcif_ma.dic.
 ## Dictionaries do not change that frequently therefore we skip the hassle of
 ## keeping them in an external volume.
-ARG USE_DICT_VERSION="1.4.2"
+ARG USE_DICT_VERSION="1.4.3"
 ENV USE_DICT_VERSION=${USE_DICT_VERSION}
 LABEL org.modelarchive.dict_release="${USE_DICT_VERSION}"
 WORKDIR ${SRC_DIR}