diff --git a/api/build.gradle b/api/build.gradle
index affde080855..09361582df8 100644
--- a/api/build.gradle
+++ b/api/build.gradle
@@ -16,11 +16,9 @@ dependencies {
             libraries.jsr305,
             libraries.animalsniffer_annotations
     compile (libraries.guava) {
-        // prefer 2.3.3 from libraries instead of 2.1.3
+        // prefer our own versions from libraries instead of Guava's dependency
         exclude group: 'com.google.errorprone', module: 'error_prone_annotations'
-        // prefer 3.0.2 from libraries instead of 3.0.1
         exclude group: 'com.google.code.findbugs', module: 'jsr305'
-        // prefer 1.17 from libraries instead of 1.14
         exclude group: 'org.codehaus.mojo', module: 'animal-sniffer-annotations'
     }
 
diff --git a/build.gradle b/build.gradle
index 4f605c838fe..a6d458fd1f7 100644
--- a/build.gradle
+++ b/build.gradle
@@ -117,7 +117,7 @@ subprojects {
 
         libraries = [
             android_annotations: "com.google.android:annotations:4.1.1.4",
-            animalsniffer_annotations: "org.codehaus.mojo:animal-sniffer-annotations:1.17",
+            animalsniffer_annotations: "org.codehaus.mojo:animal-sniffer-annotations:1.18",
             errorprone: "com.google.errorprone:error_prone_annotations:2.3.3",
             gson: "com.google.code.gson:gson:2.8.5",
             guava: "com.google.guava:guava:${guavaVersion}",
diff --git a/protobuf-lite/build.gradle b/protobuf-lite/build.gradle
index a470c2da7c3..209153426ea 100644
--- a/protobuf-lite/build.gradle
+++ b/protobuf-lite/build.gradle
@@ -13,11 +13,9 @@ dependencies {
     compile project(':grpc-api'),
             libraries.protobuf_lite
     compile (libraries.guava) {
-        // prefer 2.3.3 from libraries instead of 2.1.3
+        // prefer our own versions from libraries instead of Guava's dependency
         exclude group: 'com.google.errorprone', module: 'error_prone_annotations'
-        // prefer 3.0.2 from libraries instead of 3.0.1
         exclude group: 'com.google.code.findbugs', module: 'jsr305'
-        // prefer 1.17 from libraries instead of 1.14
         exclude group: 'org.codehaus.mojo', module: 'animal-sniffer-annotations'
     }
 
diff --git a/protobuf/build.gradle b/protobuf/build.gradle
index 04221aa7eb0..b622ef1c66e 100644
--- a/protobuf/build.gradle
+++ b/protobuf/build.gradle
@@ -13,11 +13,9 @@ dependencies {
     compile project(':grpc-api'),
             libraries.protobuf
     compile (libraries.guava) {
-        // prefer 2.3.2 from libraries instead of 2.1.3
+        // prefer our own versions from libraries instead of Guava's dependency
         exclude group: 'com.google.errorprone', module: 'error_prone_annotations'
-        // prefer 3.0.2 from libraries instead of 3.0.1
         exclude group: 'com.google.code.findbugs', module: 'jsr305'
-        // prefer 1.17 from libraries instead of 1.14
         exclude group: 'org.codehaus.mojo', module: 'animal-sniffer-annotations'
     }
 
diff --git a/repositories.bzl b/repositories.bzl
index d3f3070d9f1..366da46443b 100644
--- a/repositories.bzl
+++ b/repositories.bzl
@@ -473,8 +473,8 @@ def org_apache_commons_lang3():
 def org_codehaus_mojo_animal_sniffer_annotations():
     jvm_maven_import_external(
         name = "org_codehaus_mojo_animal_sniffer_annotations",
-        artifact = "org.codehaus.mojo:animal-sniffer-annotations:1.17",
+        artifact = "org.codehaus.mojo:animal-sniffer-annotations:1.18",
         server_urls = ["http://central.maven.org/maven2"],
-        artifact_sha256 = "92654f493ecfec52082e76354f0ebf87648dc3d5cec2e3c3cdb947c016747a53",
+        artifact_sha256 = "47f05852b48ee9baefef80fa3d8cea60efa4753c0013121dd7fe5eef2e5c729d",
         licenses = ["notice"],  # MIT
     )