diff --git a/.gitlab/merge_request_templates/General.md b/.gitlab/merge_request_templates/General.md
new file mode 100644
index 0000000000000000000000000000000000000000..b3934b37072ff377f46028ca8a93cebe3771b6fd
--- /dev/null
+++ b/.gitlab/merge_request_templates/General.md
@@ -0,0 +1,29 @@
+Insert a meaningful description for this merge request here.  What is the
+new/changed behavior?  Which bug was fixed?
+
+---
+
+Add the text above this line to the git comment.
+
+# Check list for the author #
+
+- [ ] All tests pass. (style, unit/integration, static code analysis)
+- [ ] What is the main focus for the reviewer?  What is the core intent of this
+      MR?
+- [ ] How to set up a test environment.
+- [ ] Annotations in code (Gitlab comments)
+  - Intent of new code
+  - Problems with old code
+  - Why this implementation?
+
+# Check list for the reviewer #
+
+- [ ] Tests pass
+- [ ] Do I understand the intent of this MR?
+- [ ] Does the test environment setup work?
+- [ ] Is the intended behavior reproducible in the test environment?
+- [ ] Code overview: Which functions/classes are relevant for understanding the MR?
+- [ ] Work through the open comment threads.
+- [ ] Are the doc strings / comments up-to-date?  Or have there been behavioral
+  changes without amending the documentation?
+- [ ] Are there spezifications? Are they satisfied?
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 007370aa4c5c83f3127c81fed9705aa1db262635..76ca2594102b4a455712eef30b0190aa3f45e7e9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -22,6 +22,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed ###
 
+- Replaced deprecated Logger.warn() method.
+
 ### Security ###
 
 ## [0.3.0] - 2020-04-24##
diff --git a/setup.py b/setup.py
index cfdf462ce4217dc6180c0b7af60a87f20e2003c7..8893a126a7a02d7646625af7fc82787238344173 100755
--- a/setup.py
+++ b/setup.py
@@ -47,9 +47,9 @@ from setuptools import find_packages, setup
 
 MAJOR = 0
 MINOR = 3
-MICRO = 1
+MICRO = 2
 PRE = ""  # e.g. rc0, alpha.1, 0.beta-23
-ISRELEASED = True
+ISRELEASED = False
 
 if PRE:
     VERSION = "{}.{}.{}-{}".format(MAJOR, MINOR, MICRO, PRE)
diff --git a/src/caosdb/connection/connection.py b/src/caosdb/connection/connection.py
index 94ee3d0817d448285d5f828ecb8d0ac27079024a..d21f8b0c65ca8be5a9ccb687542ee838a50b2d79 100644
--- a/src/caosdb/connection/connection.py
+++ b/src/caosdb/connection/connection.py
@@ -178,10 +178,10 @@ class _DefaultCaosDBServerConnection(CaosDBServerConnection):
         context.verify_mode = ssl.CERT_REQUIRED
 
         if config.get("ssl_insecure"):
-            _LOGGER.warn("*** Warning! ***\n"
-                         "Insecure SSL mode, certificate will not be checked! "
-                         "Please consider removing the `ssl_insecure` configuration option.\n"
-                         "****************")
+            _LOGGER.warning("*** Warning! ***\n"
+                            "Insecure SSL mode, certificate will not be checked! "
+                            "Please consider removing the `ssl_insecure` configuration option.\n"
+                            "****************")
             context.verify_mode = ssl.CERT_NONE
 
         if (not context.verify_mode == ssl.CERT_NONE and