diff --git a/Dockerfile b/Dockerfile
index 602a69f1..5cc8cfab 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -10,9 +10,10 @@ ARG ODK_VERSION 0.0.0
 ENV ODK_VERSION=$ODK_VERSION
 
 # Software versions
+# Jena 5.x requires Java 17, so for now we are stuck with Jena 4.x
 ENV JENA_VERSION=4.9.0
-ENV KGCL_JAVA_VERSION=0.5.0
-ENV SSSOM_JAVA_VERSION=1.0.0
+ENV KGCL_JAVA_VERSION=0.5.1
+ENV SSSOM_JAVA_VERSION=1.1.1
 ENV AMMONITE_VERSION=2.5.9
 
 # Avoid repeated downloads of script dependencies by mounting the local coursier cache:
diff --git a/docker/builder/Dockerfile b/docker/builder/Dockerfile
index 1bed415f..b96f392c 100644
--- a/docker/builder/Dockerfile
+++ b/docker/builder/Dockerfile
@@ -8,7 +8,7 @@ WORKDIR /build
 
 # Software versions
 ENV RDFTAB_VERSION=0.1.1
-ENV SOUFFLE_VERSION=2.4
+ENV SOUFFLE_VERSION=2.4.1
 ENV FASTOBO_VALIDATOR_VERSION=0.4.6
 
 # Everything that we want to get into one of the final ODK images