diff --git a/godoc.md b/godoc.md
index 85a9f0a..a99f7c3 100644
--- a/godoc.md
+++ b/godoc.md
@@ -26,6 +26,7 @@ Package tagcmp provides image tag comparison operations\.
   - [func (t Tag) IsCompatible(tag Tag) bool](<#func-tag-iscompatible>)
   - [func (t Tag) IsGreaterThan(tag Tag) bool](<#func-tag-isgreaterthan>)
   - [func (t Tag) IsLessThan(tag Tag) bool](<#func-tag-islessthan>)
+  - [func (pin Tag) IsUpgradeCompatible(upTag Tag) bool](<#func-tag-isupgradecompatible>)
   - [func (t Tag) String() string](<#func-tag-string>)
   - [func (curTag Tag) UpgradeDelta(newTag Tag) (TagDelta, error)](<#func-tag-upgradedelta>)
 - [type TagDelta](<#type-tagdelta>)
@@ -181,6 +182,14 @@ func (t Tag) IsLessThan(tag Tag) bool
 
 IsLessThan tests if a tag is less than another\. There are some tag\-isms to take into account here\, shorter is bigger \(i\.e\. 2\.1 \< 2\.1\.1 == false\, 2 \< 2\.1 == false\)\.
 
+### func \(Tag\) IsUpgradeCompatible
+
+```go
+func (pin Tag) IsUpgradeCompatible(upTag Tag) bool
+```
+
+IsUpgradeCompatible chekcs if upTag is compatible with a pinned version tag\. I\.e\. pinning to 22\-fpm should return true if upTag is 22\.2\.0\-fpm but not 22\.2\.0\-alpine or 23\.0\.0\-fpm
+
 ### func \(Tag\) String
 
 ```go