diff --git a/CHANGELOG.md b/CHANGELOG.md
index f8d39dc7..e35460be 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -34,6 +34,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Not all errors during makefile generation were catched (got a stack trace).
 - Output dirs created when generating a makefile for a compress target.
 - Problems with some SnapEDA libs (extra space in lib termination tag #57)
+- The "References" (plural) column is now coloured as "Reference" (singular)
 
 ## [0.10.1] - 2021-02-22
 ### Added
diff --git a/kibot/bom/columnlist.py b/kibot/bom/columnlist.py
index 06af7959..c1422c7c 100644
--- a/kibot/bom/columnlist.py
+++ b/kibot/bom/columnlist.py
@@ -83,6 +83,7 @@ class ColumnList:
     # These columns are 'immutable'
     COLUMNS_PROTECTED_L = {
         COL_REFERENCE_L[:-1],  # The column is References and the field Reference
+        COL_REFERENCE_L,  # The column is References and the field Reference
         COL_GRP_QUANTITY_L,
         COL_VALUE_L,
         COL_PART_L,