diff --git a/core-api/build.gradle b/core-api/build.gradle
index cd1d1fa9e..9a966616f 100644
--- a/core-api/build.gradle
+++ b/core-api/build.gradle
@@ -2,8 +2,8 @@ dependencies {
     compile group: 'org.slf4j', name: 'slf4j-api', version: slf4jVersion
     compile group: 'com.fasterxml.jackson.core', name: 'jackson-annotations', version: jacksonVersion
 
-    compile group: 'com.google.code.findbugs', name: 'annotations', version: findbugsVersion
-    compile group: 'com.google.code.findbugs', name: 'jsr305', version: findbugsVersion
+    compile group: 'com.google.code.findbugs', name: 'annotations', version: findbugsAnnotationVersion
+    compile group: 'com.google.code.findbugs', name: 'jsr305', version: findbugsJsrVersion
 
     // an assortment of json parsers
     compileOnly group: 'com.google.code.gson', name: 'gson', version: gsonVersion, optional
diff --git a/core-httpclient-impl/gradle.properties b/core-httpclient-impl/gradle.properties
index db89b1cbc..01204199a 100644
--- a/core-httpclient-impl/gradle.properties
+++ b/core-httpclient-impl/gradle.properties
@@ -1 +1 @@
-httpClientVersion = 4.5.2
+httpClientVersion = 4.5.6
diff --git a/gradle.properties b/gradle.properties
index f5ac305dc..9f04aa943 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -13,14 +13,15 @@ org.gradle.parallel = true
 gsonVersion = 2.6.1
 guavaVersion = 19.0
 hamcrestVersion = 1.3
-jacksonVersion = 2.7.1
+jacksonVersion = 2.9.6
 jsonVersion = 20160212
 jsonSimpleVersion = 1.1.1
 logbackVersion = 1.1.5
-slf4jVersion = 1.7.16
+slf4jVersion = 1.7.25
 
 # Style Packages
-findbugsVersion = 3.0.1
+findbugsAnnotationVersion = 3.0.1
+findbugsJsrVersion = 3.0.2
 
 # Test Packages
 junitVersion = 4.12