diff --git a/.github/workflows/prettier-json.yml b/.github/workflows/prettier-json.yml
index fb928cfb..7259a049 100644
--- a/.github/workflows/prettier-json.yml
+++ b/.github/workflows/prettier-json.yml
@@ -12,7 +12,7 @@ on: # yamllint disable-line rule:truthy
 jobs:
   json-lint:
     name: 'Prettier JSON Lint'
-    runs-on: ['ubuntu-24.04']
+    runs-on: ['ubuntu-26.04']
     steps:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
 
@@ -23,7 +23,7 @@ jobs:
 
       - name: Install Prettier
         run: |
-          npm install -g --ignore-scripts prettier@3.7.4
+          npm install -g --ignore-scripts prettier@3.9.6
 
       - name: Prettier LINT / Style JSON
         run: >
diff --git a/Makefile b/Makefile
index e869538e..87a74d35 100644
--- a/Makefile
+++ b/Makefile
@@ -26,6 +26,14 @@ BRUTEFORCE :=$(shell echo '${BRUTEFORCE}'| tr '[:lower:]' '[:upper:]'| tr -d '[:
 .PHONY: all clean dependencies help list test
 .EXPORT_ALL_VARIABLES: # (2)
 
+define crono
+	@start=$$(date +%s); \
+		$(1); \
+		end=$$(date +%s); \
+		diff=$$((end - start)); \
+		printf "Total time: %02d:%02d:%02d\n" $$((diff/3600)) $$((diff%3600/60)) $$((diff%60))
+endef
+
 RUNTIME_TOOL=python3
 PACKAGE_TOOL=pipenv
 
@@ -108,7 +116,7 @@ lint/yaml:
 
 lint: test/styling test/static
 
-lint/all: lint/markdown lint/yaml test/styling test/static
+lint/all: lint/markdown lint/yaml lint/json test/styling test/static
 
 format/json:
 	prettier --write ./src/**/*.json
@@ -164,6 +172,13 @@ compose/rebuild: env
 	${DOCKER_COMPOSE} --profile testing build --no-cache
 	${DOCKER_COMPOSE} --profile production build --no-cache
 
+compose/lint/json:
+	${DOCKER_COMPOSE} --profile lint run --rm \
+    --workdir /workspace \
+    -v "$$(pwd):/workspace" \
+    prettier --check '/workspace/**/*.json' \
+		&& echo '✔  Your code looks good.'
+
 compose/lint/markdown:
 	${DOCKER_COMPOSE} --profile lint run --rm \
     --workdir /workspace \
@@ -184,7 +199,7 @@ compose/test/styling: compose/build
 compose/test/static: compose/build
 	${DOCKER_COMPOSE} --profile lint run --rm algorithm-exercises-py-lint make test/static
 
-compose/lint: compose/lint/markdown compose/lint/yaml compose/test/styling compose/test/static
+compose/lint: compose/lint/json compose/lint/markdown compose/lint/yaml compose/test/styling compose/test/static
 
 compose/test: compose/build
 	${DOCKER_COMPOSE} --profile testing run --rm algorithm-exercises-py-test make test
@@ -192,7 +207,10 @@ compose/test: compose/build
 compose/run: compose/build
 	${DOCKER_COMPOSE} --profile production run --rm algorithm-exercises-py make run
 
-all: lint coverage
+compose/all: compose/rebuild compose/test compose/lint
+
+all:
+	$(call crono, make clean; make dependencies; make build; make test; make lint; make coverage/html)
 
 run:
 	ls -alh
diff --git a/compose.yaml b/compose.yaml
index 3c1c6e4d..edcf7617 100644
--- a/compose.yaml
+++ b/compose.yaml
@@ -25,6 +25,13 @@ services:
       - ./:/app
     profiles: ["lint"]
 
+  prettier:
+    image: goncl/prettier:latest
+    working_dir: /workspace
+    volumes:
+      - ./:/workspace
+    profiles: ["lint"]
+
   markdownlint:
     image: goncl/markdownlint-cli:latest
     working_dir: /workspace