diff --git a/changelog/@unreleased/pr-1456.v2.yml b/changelog/@unreleased/pr-1456.v2.yml
new file mode 100644
index 000000000..f398f9c13
--- /dev/null
+++ b/changelog/@unreleased/pr-1456.v2.yml
@@ -0,0 +1,5 @@
+type: improvement
+improvement:
+  description: Make TODO checkstyle rule case insensitive to catch lowercase TODO comments
+  links:
+  - https://github.com/palantir/gradle-baseline/pull/1456
diff --git a/gradle-baseline-java-config/resources/checkstyle/checkstyle.xml b/gradle-baseline-java-config/resources/checkstyle/checkstyle.xml
index a3766f3a0..2be3288d7 100644
--- a/gradle-baseline-java-config/resources/checkstyle/checkstyle.xml
+++ b/gradle-baseline-java-config/resources/checkstyle/checkstyle.xml
@@ -367,6 +367,7 @@
         <module name="RegexpSinglelineJava">
             <property name="format" value="\/\/TODO|\/\/ TODO(?!\([^()\s]+\): )"/>
             <property name="message" value="TODO format: // TODO(#issue): explanation"/>
+            <property name="ignoreCase" value="true"/>
         </module>
         <module name="RegexpSinglelineJava">
             <property name="format" value="(void setUp\(\))|(void setup\(\))|(void setupStatic\(\))|(void setUpStatic\(\))|(void beforeTest\(\))|(void teardown\(\))|(void tearDown\(\))|(void beforeStatic\(\))|(void afterStatic\(\))"/>