diff --git a/build.gradle b/build.gradle
index fadeff1..41cc28c 100644
--- a/build.gradle
+++ b/build.gradle
@@ -97,7 +97,7 @@ dependencies {
     jmh 'org.openjdk.jmh:jmh-generator-annprocess:1.37'
 
     errorprone 'com.uber.nullaway:nullaway:0.12.7'
-    errorprone 'com.google.errorprone:error_prone_core:2.39.0'
+    errorprone 'com.google.errorprone:error_prone_core:2.40.0'
 
     // just tests
     testCompileOnly 'org.jetbrains.kotlin:kotlin-stdlib-jdk8'