diff --git a/docs/HISTORY.txt b/docs/HISTORY.txt
index 9cda4e513c0..eec33e54768 100644
--- a/docs/HISTORY.txt
+++ b/docs/HISTORY.txt
@@ -10,6 +10,7 @@ Changelog
 2019.4.0rc1 (2019-08-08)
 ------------------------
 
+- Bump ftw.bumblebee to 3.7.3 to get fix for indexing checksum in ftw.solr. [lgraf]
 - Implement SIP delivery via FilesystemTransport. [lgraf]
 - Disallow deleting repository folders and roots except from the RepositoryDeleter. [njohner]
 - Expose document actions in @actions endpoint in separate file_actions category. [njohner, deiferni]
diff --git a/versions.cfg b/versions.cfg
index b68bf2203c5..cc9f9a8f29e 100644
--- a/versions.cfg
+++ b/versions.cfg
@@ -68,7 +68,7 @@ five.pt = 2.2.5
 five.z2monitor = 0.2
 forbiddenfruit = 0.1.2
 ftw.builder = 1.11.1
-ftw.bumblebee = 3.7.2
+ftw.bumblebee = 3.7.3
 ftw.casauth = 1.2.0
 ftw.catalogdoctor = 1.0.0
 ftw.chameleon = 1.2.0