diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index 98e85ed..aa484b0 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -2,7 +2,7 @@ name: ci
 
 on:
   push:
-    branches: [ "master" ]
+    branches: [ "*" ]
     tags: [ "*" ]
   pull_request:
 
diff --git a/Dockerfile b/Dockerfile
index 5b5206d..86b5983 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,11 +1,16 @@
 # Init image
-FROM python:3
+FROM python:slim
 WORKDIR /app
 
 # Install requirements
 COPY requirements.txt .
 RUN pip install --no-cache-dir -r requirements.txt
-RUN wget -O /usr/bin/regctl https://github.com/regclient/regclient/releases/latest/download/regctl-linux-amd64
+RUN python - <<EOF
+from urllib.request import urlopen;
+from pathlib import Path;
+Path("/usr/bin/regctl").write_bytes(urlopen("https://github.com/regclient/regclient/releases/latest/download/regctl-linux-amd64").read())
+EOF
+
 RUN chmod 755 /usr/bin/regctl
 
 # Import app
diff --git a/dockup b/dockup
index c42ded1..510579c 100755
--- a/dockup
+++ b/dockup
@@ -136,15 +136,13 @@ def get_remote_tags(images):
 
             for tag in tags:
                 # Skip mismatched suffixes
-                if local_suffix and not tag.endswith(local_suffix):
-                    continue
-
-                # Skip non-production versions
-                if any(
-                    bad_keyword in tag.lower()
-                    for bad_keyword in ["test", "rc", "alpha", "beta", "devel"]
-                ):
-                    continue
+                if local_suffix:
+                    if not tag.endswith(local_suffix):
+                        continue
+                else:
+                    # Skip tags with suffixes if local has none
+                    if "-" in tag:
+                        continue
 
                 # Validate version structure
                 if is_valid_semver(