diff --git a/.github/pull_request_template.md b/.github/pull_request_template.md
index fe3e8c378..73aa0ac1c 100644
--- a/.github/pull_request_template.md
+++ b/.github/pull_request_template.md
@@ -12,6 +12,7 @@
 
 - [ ] Example is testable in synthetic monitoring system, or `lambda-test: false` is added to example frontmatter
 - [ ] Example does _not_ require third-party dependencies to be installed locally
+- [ ] Example pins all dependencies and specifies a `python_version` for the base image
 - [ ] Example is documented with comments throughout, in a [_Literate Programming_](https://en.wikipedia.org/wiki/Literate_programming) style.
 
 ## Outside contributors