diff --git a/buildSrc/build.gradle b/buildSrc/build.gradle
index b021bab6338b3..6bc461e1b598c 100644
--- a/buildSrc/build.gradle
+++ b/buildSrc/build.gradle
@@ -96,7 +96,7 @@ dependencies {
   compile 'com.perforce:p4java:2012.3.551082' // THIS IS SUPPOSED TO BE OPTIONAL IN THE FUTURE....
   compile 'de.thetaphi:forbiddenapis:2.4.1'
   compile 'org.apache.rat:apache-rat:0.11'
-  compile "org.elasticsearch:jna:4.4.0-1"
+  compile "org.elasticsearch:jna:4.5.1"
 }
 
 // Gradle 2.14+ removed ProgressLogger(-Factory) classes from the public APIs
diff --git a/buildSrc/version.properties b/buildSrc/version.properties
index 59cbddfe41c6b..7419a8b131a8b 100644
--- a/buildSrc/version.properties
+++ b/buildSrc/version.properties
@@ -11,7 +11,7 @@ log4j             = 2.9.1
 slf4j             = 1.6.2
 
 # when updating the JNA version, also update the version in buildSrc/build.gradle
-jna               = 4.4.0-1
+jna               = 4.5.1
 
 # test dependencies
 randomizedrunner  = 2.5.2
diff --git a/core/licenses/jna-4.4.0-1.jar.sha1 b/core/licenses/jna-4.4.0-1.jar.sha1
deleted file mode 100644
index 6b564834b5733..0000000000000
--- a/core/licenses/jna-4.4.0-1.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-c9dfcec6f07ee4b1d7a6c09a7eaa9dd4fb6d2c79
\ No newline at end of file
diff --git a/core/licenses/jna-4.5.1.jar.sha1 b/core/licenses/jna-4.5.1.jar.sha1
new file mode 100644
index 0000000000000..f03d0d1fc7e33
--- /dev/null
+++ b/core/licenses/jna-4.5.1.jar.sha1
@@ -0,0 +1 @@
+da10908ae23dc59b19dc258e63aea1c44621dc3a
\ No newline at end of file