diff --git a/build.gradle b/build.gradle
index 6d8f593..336a76e 100644
--- a/build.gradle
+++ b/build.gradle
@@ -12,7 +12,7 @@ plugins {
   id('net.ltgt.errorprone') version '3.1.0'
 
   // Checker Framework pluggable type-checking
-  id 'org.checkerframework' version '0.6.38'
+  id 'org.checkerframework' version '0.6.40'
 
   // To show task list as a tree, run: ./gradlew <taskname> taskTree
   id 'com.dorongold.task-tree' version '3.0.0'