diff --git a/.gitignore b/.gitignore
index 553aac46..8418dd5e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -17,6 +17,7 @@ catalog-v001.xml
 .*.swp
 
 # Workflow files
+*.jar
 .*.done.log
 .venv-pre-commit
 venv
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 339017a6..6aee99af 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -9,3 +9,9 @@ repos:
             - --indent=4
             - --no-ensure-ascii
             - --no-sort-keys
+-   repo: https://github.com/kchason/rdf-toolkit-action
+    rev: 0.1.2
+    hooks:
+    -   id: rdf-toolkit-normalizer
+        args:
+            - --autofix
diff --git a/Makefile b/Makefile
index e2c8838a..949e8625 100644
--- a/Makefile
+++ b/Makefile
@@ -32,11 +32,6 @@ all: \
 # for someone developing with different submodule pointers.
 .git_submodule_init.done.log: \
   .gitmodules
-	# CASE-Utilities-Python
-	test -r dependencies/CASE-Utilities-Python/README.md \
-	  || (git submodule init dependencies/CASE-Utilities-Python && git submodule update dependencies/CASE-Utilities-Python)
-	test -r dependencies/CASE-Utilities-Python/README.md \
-	  || (echo "ERROR:Makefile:CASE-Utilities-Python submodule README.md file not found, even though CASE-Utilities-Python submodule initialized." >&2 ; exit 2)
 	# CASE-develop
 	test -r dependencies/CASE-develop/README.md \
 	  || (git submodule init dependencies/CASE-develop && git submodule update dependencies/CASE-develop)
@@ -57,12 +52,6 @@ all: \
 	  || (git submodule init dependencies/UCO-unstable && git submodule update dependencies/UCO-unstable)
 	test -r dependencies/UCO-unstable/README.md \
 	  || (echo "ERROR:Makefile:UCO-unstable submodule README.md file not found, even though UCO-unstable submodule initialized." >&2 ; exit 2)
-	# Retrieve rdf-toolkit.jar.
-	cd dependencies/CASE-Utilities-Python \
-	  && git submodule update --init dependencies/CASE
-	$(MAKE) \
-	  --directory dependencies/CASE-Utilities-Python/dependencies/CASE \
-	  .lib.done.log
 	touch $@
 
 # This virtual environment is meant to be built once and then persist, even through 'make clean'.
@@ -102,10 +91,7 @@ all: \
 	    wheel
 	source venv/bin/activate \
 	  && pip install \
-	      dependencies/CASE-Utilities-Python
-	source venv/bin/activate \
-	  && pip install \
-	      --requirement requirements.txt
+	    --requirement requirements.txt
 	touch $@
 
 check: \
diff --git a/dependencies/CASE-Utilities-Python b/dependencies/CASE-Utilities-Python
index 1521663a..33d95650 160000
--- a/dependencies/CASE-Utilities-Python
+++ b/dependencies/CASE-Utilities-Python
@@ -1 +1 @@
-Subproject commit 1521663a7019ccc97e2039899815337052e3b6f5
+Subproject commit 33d9565047549e7da2e359526164ee87410feb53
diff --git a/examples/illustrations/src/illustration-nosrc.mk b/examples/illustrations/src/illustration-nosrc.mk
index 29130829..6000d4e1 100644
--- a/examples/illustrations/src/illustration-nosrc.mk
+++ b/examples/illustrations/src/illustration-nosrc.mk
@@ -23,8 +23,6 @@ SHELL := /bin/bash
 # The expected execution context is in any sibling directory of this Makefile's directory.
 top_srcdir := $(shell cd ../../.. ; pwd)
 
-RDF_TOOLKIT_JAR := $(top_srcdir)/dependencies/CASE-Utilities-Python/dependencies/CASE/lib/rdf-toolkit.jar
-
 example_name := $(shell basename $$PWD)
 
 # Use a drafting.ttl file in the validation and dependency list, if it is present.
@@ -42,78 +40,54 @@ all: \
 
 $(example_name)_validation.ttl: \
   $(example_name).json \
-  $(RDF_TOOLKIT_JAR) \
   $(drafting_ttl) \
   $(top_srcdir)/.venv.done.log
-	rm -f __$@
+	rm -f _$@
 	source $(top_srcdir)/venv/bin/activate \
 	  && case_validate \
 	    --format turtle \
 	    $(drafting_validation_flag) \
-	    --output __$@ \
+	    --output _$@ \
 	    $< \
 	    $(drafting_ttl) \
 	    ; rc=$$? ; test 0 -eq $$rc -o 1 -eq $$rc
-	test -s __$@
-	java -jar $(RDF_TOOLKIT_JAR) \
-	  --inline-blank-nodes \
-	  --source __$@ \
-	  --source-format turtle \
-	  --target _$@ \
-	  --target-format turtle
-	rm __$@
+	test -s _$@
 	mv _$@ $@
 
 $(example_name)_validation-develop.ttl: \
   $(example_name).json \
-  $(RDF_TOOLKIT_JAR) \
   $(drafting_ttl) \
   $(top_srcdir)/.venv.done.log \
   $(top_srcdir)/dependencies/CASE-develop.ttl
-	rm -f __$@
+	rm -f _$@
 	source $(top_srcdir)/venv/bin/activate \
 	  && case_validate \
 	    --built-version none \
 	    --format turtle \
 	    $(drafting_validation_flag) \
 	    --ontology-graph $(top_srcdir)/dependencies/CASE-develop.ttl \
-	    --output __$@ \
+	    --output _$@ \
 	    $< \
 	    ; rc=$$? ; test 0 -eq $$rc -o 1 -eq $$rc
-	test -s __$@
-	java -jar $(RDF_TOOLKIT_JAR) \
-	  --inline-blank-nodes \
-	  --source __$@ \
-	  --source-format turtle \
-	  --target _$@ \
-	  --target-format turtle
-	rm __$@
+	test -s _$@
 	mv _$@ $@
 
 $(example_name)_validation-unstable.ttl: \
   $(example_name).json \
-  $(RDF_TOOLKIT_JAR) \
   $(drafting_ttl) \
   $(top_srcdir)/.venv.done.log \
   $(top_srcdir)/dependencies/CASE-unstable.ttl
-	rm -f __$@
+	rm -f _$@
 	source $(top_srcdir)/venv/bin/activate \
 	  && case_validate \
 	    --built-version none \
 	    --format turtle \
 	    $(drafting_validation_flag) \
 	    --ontology-graph $(top_srcdir)/dependencies/CASE-unstable.ttl \
-	    --output __$@ \
+	    --output _$@ \
 	    $< \
 	    ; rc=$$? ; test 0 -eq $$rc -o 1 -eq $$rc
-	test -s __$@
-	java -jar $(RDF_TOOLKIT_JAR) \
-	  --inline-blank-nodes \
-	  --source __$@ \
-	  --source-format turtle \
-	  --target _$@ \
-	  --target-format turtle
-	rm __$@
+	test -s _$@
 	mv _$@ $@
 
 check: \
diff --git a/requirements.txt b/requirements.txt
index e079f8a6..0706ce5c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1,2 @@
+case_utils >= 0.4.0, < 0.6.0
 pytest