diff --git a/.github/pull_request_template.md b/.github/pull_request_template.md
index f903fcf..dd13ae1 100644
--- a/.github/pull_request_template.md
+++ b/.github/pull_request_template.md
@@ -2,6 +2,11 @@
 <!-- Describe the changes you have made. -->
 
 
+##### DATASHEETS / REFERENCES
+<!-- When submitting a new device or package, please provide links to the
+necessary datasheets, package drawings or standards documents.-->
+
+
 ##### OPEN QUESTIONS / UNRESOLVED ISSUES
 <!-- List topics you are unsure about, if any. Otherwise, leave this empty. -->
 
@@ -12,7 +17,13 @@ by adding an "x" between the brackets (i.e. "[x]"). If you are unsure, leave
 the corresponding items unchecked so the library maintainers know where help
 is needed. -->
 
-- [ ] I have read and followed the [library conventions](https://docs.librepcb.org/#libraryconventions).
+- [ ] I have read and followed the library conventions¹.
 - [ ] For packages, I followed IPC7351C (see details in library conventions).
+- [ ] For modified elements, I bumped their version number².
+- [ ] I already used the new library elements in a design and verified their correctness (optional).
 - [ ] I'm the copyright owner of the added content (i.e. the changes are made by myself, not copied/imported from somewhere else).
-- [ ] I agree to publish all my changes under the [CC0 Public Domain License](https://en.wikipedia.org/wiki/CC0), allowing everyone to use and modify the content without any restrictions.
+- [ ] I agree to publish all my changes under the CC0 Public Domain License³, allowing everyone to use and modify the content without any restrictions.
+
+¹ *Library Conventions: https://docs.librepcb.org/#libraryconventions*
+² *Minor version bump if only metadata was modified (e.g. "0.1" -> "0.1.1"), major version bump if functional changes were made (e.g. "0.1" -> "0.2")*
+³ *CC0 Public Domain License: https://en.wikipedia.org/wiki/CC0*
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 73b2393..da81e7b 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -2,9 +2,9 @@ name: CI
 on: [push, pull_request]
 jobs:
   check:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     container:
-      image: librepcb/librepcb-cli:0.1.3
+      image: librepcb/librepcb-cli:0.1.5
       options: --entrypoint /bin/bash
     steps:
     - uses: actions/checkout@v1