diff --git a/docker-compose.yml b/docker-compose.yml
index 7e143d5..b93feaa 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -6,4 +6,4 @@ services:
   volumes:
    - ./docker-compose.py:/docker-compose.py
    - ./sample:/services
-  command: bash -c 'python3 /docker-compose.py /services/*'
\ No newline at end of file
+  command: bash -c 'python3 /docker_compose.py /services/*'
\ No newline at end of file
diff --git a/docker-compose.py b/docker_compose.py
similarity index 92%
rename from docker-compose.py
rename to docker_compose.py
index c98e2e0..64f8f8e 100644
--- a/docker-compose.py
+++ b/docker_compose.py
@@ -109,7 +109,7 @@ class Collector:
 def start(files, ignores):
 	collector = Collector()
 	for f in files:
-		if any([i in f for i in ignores]):
+		if ignores and any([i in f for i in ignores]):
 			log.warn(f"skip {f} due to ignore rule")
 			continue
 		if not f.endswith(COMPOSE_FILE):
@@ -124,14 +124,15 @@ def start(files, ignores):
 	#print(json.dumps(collector.get_images_sources(), indent=1))
 	return collector.get_images_sources()
 		
-		
-
-if __name__ == "__main__":
-	parser = argparse.ArgumentParser(description="Docker-compose parser")
+def args_setup(description):
+	parser = argparse.ArgumentParser(description=description)
 	parser.add_argument("compose_files", nargs="+")
 	parser.add_argument("--output", "-o")
-	parser.add_argument("--ignore", "-i", nargs="+")
-	
+	parser.add_argument("--ignore", "-i", nargs="+", default=False)
+	return parser
+
+if __name__ == "__main__":
+	parser = args_setup("Docker-compose parser")
 	
 	args = parser.parse_args()
 	
diff --git a/image_tags.py b/image_tags.py
index ef3ea73..551b210 100644
--- a/image_tags.py
+++ b/image_tags.py
@@ -1,43 +1,80 @@
-import requests
-from datetime import datetime
 import argparse
 import json
+import logging
+from datetime import datetime
+
+from packaging import version
+import requests
+
+
+log = logging
 
 TAGS = "https://registry.hub.docker.com/v2/repositories/{image}/tags/"
 LIB_PREFIX = "library/"
 
 TAG_STORE = {}
 
-def get_tags(image):
-	if "/" not in image:
-		image = LIB_PREFIX + image
-	url = TAGS.format(image=image)
+def api_call(url):
 	result = requests.get(url)
+	if not result.ok:
+		log.error(result, result.url)
+		return {}
 	data = result.json()
 	tags = {}
 	for entry in data["results"]:
-		tags[entry["name"]] = datetime.strptime(entry["last_updated"], "%Y-%m-%dT%H:%M:%S.%fZ")
+		tags[entry["name"]] = datetime.strptime(entry["last_updated"], "%Y-%m-%dT%H:%M:%S.%fZ") if entry["last_updated"] else "------"
+	if data['next']:
+		tags.update(api_call(data['next']))
 	return tags
 
+def get_tags(image):
+	if "/" not in image:
+		image = LIB_PREFIX + image
+	if ":" in image:
+		image = image.split(":")[0]
+	url = TAGS.format(image=image)
+	tags = api_call(url)
+	if not len(tags):
+		raise ValueError(f"Unknown image '{image}'")
+	return tags
+
+def replace(string, replacements):
+	for k,v in replacements:
+		string = string.replace(k,v)
+	return string
+
+
+def compare(base, other, replacements=[("-","+"),]):
+	base = replace(base, replacements)
+	other = replace(other, replacements)
+	v1 = version.parse(base)
+	v2 = version.parse(other)
+	result = v1 < v2
+	log.debug(f"{v1} < {v2}: {result}")
+	return result
+
 def get_new_tags(image):
 	if not ":" in image:
-		print("using implicit latest, skip")
+		log.warn("using implicit latest, skip")
 		return
 	image_name, current_tag = image.split(":")
 	if not image_name in TAG_STORE:
 		TAG_STORE[image_name] = get_tags(image_name)
-	if current_tag in TAG_STORE[image_name]:
-		first_update = TAG_STORE[image_name][current_tag]
-	else:
-		print("!!! FALLBACK!")
-		first_update = TAG_STORE[image_name].entry_set()[0]
-	print(first_update)
+	#if current_tag in TAG_STORE[image_name]:
+	#	first_update = TAG_STORE[image_name][current_tag]
+	#else:
+	#	print("!!! FALLBACK!")
+	#	first_update = list(TAG_STORE[image_name].values())[0]
+	#print(first_update)
 	new_tags = {}
 	for tag in TAG_STORE[image_name]:
-		print("("+str(tag)+")")
-		update = TAG_STORE[image_name][tag]
-		if update > first_update:
+		log.debug("check("+str(tag)+")")
+		if compare(current_tag, tag):
+			log.debug("NEWER!!!")
+			update = TAG_STORE[image_name][tag]
 			new_tags[tag] = str(update)
+			log.debug(tag)
+			
 	return new_tags
 
 if __name__=="__main__":
@@ -47,7 +84,7 @@ if __name__=="__main__":
 	
 	args= parser.parse_args()
 	for i in args.image:
-		print(i)
+		log.debug(i)
 		if args.list:
 			print(json.dumps({k:str(v) for k,v in get_tags(i).items()}, indent=1))
 		else:
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..0bfc676
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,2 @@
+requests
+packaging
\ No newline at end of file
diff --git a/show_updateable.py b/show_updateable.py
new file mode 100644
index 0000000..5c6becb
--- /dev/null
+++ b/show_updateable.py
@@ -0,0 +1,35 @@
+import argparse
+import json
+
+import docker_compose
+import image_tags
+
+
+
+
+def main(args):
+	updates = {}
+	images = docker_compose.start(args.compose_files, args.ignore)
+	for image in images:
+		for tag in images[image]:
+			image_ref = f"{image}:{tag}"
+			try:
+				newer_tags = image_tags.get_new_tags(image_ref)
+			except ValueError as e:
+				newer_tags = e.args
+			updates[image_ref] = {
+				"updates": newer_tags,
+				"usages": images[image][tag]
+			}
+	if args.output:
+		with open(args.output, "w") as out:
+			json.dump(updates, out, indent=1, sort_keys=True)
+	else:
+		print(json.dumps(updates, indent=1))
+			
+
+if __name__=="__main__":
+	parser = docker_compose.args_setup("Show updates for docker-compose style services")
+	args = parser.parse_args()
+	main(args)
+	
\ No newline at end of file