diff --git a/third-party-dependencies/pom.xml b/third-party-dependencies/pom.xml
index a962da7d..a8c9e254 100644
--- a/third-party-dependencies/pom.xml
+++ b/third-party-dependencies/pom.xml
@@ -60,7 +60,7 @@
     <gson.version>2.9.0</gson.version>
     <threeten.version>1.5.2</threeten.version>
     <javax.annotations.version>1.3.2</javax.annotations.version>
-    <animal-sniffer.version>1.20</animal-sniffer.version>
+    <animal-sniffer.version>1.21</animal-sniffer.version>
     <opencensus.version>0.31.0</opencensus.version>
     <findbugs.version>3.0.2</findbugs.version>
     <errorprone.version>2.11.0</errorprone.version>