KNOX-2116 - com.nimbusds:lang-tag needs a fixed version

Signed-off-by: Kevin Risden <krisden@apache.org>
diff --git a/pom.xml b/pom.xml
index 09abcd9..72d19a1 100644
--- a/pom.xml
+++ b/pom.xml
@@ -217,6 +217,7 @@
         <json-path.version>2.4.0</json-path.version>
         <json-smart.version>2.3</json-smart.version>
         <junit.version>4.12</junit.version>
+        <lang-tag.version>1.4.4</lang-tag.version>
         <libpam4j.version>1.11</libpam4j.version>
         <log4j.version>1.2.17</log4j.version>
         <log4j2.version>2.12.1</log4j2.version>
@@ -1157,12 +1158,19 @@
                 <artifactId>jersey-server</artifactId>
                 <version>${jersey.version}</version>
             </dependency>
+
             <dependency>
                 <groupId>com.nimbusds</groupId>
                 <artifactId>nimbus-jose-jwt</artifactId>
                 <version>${nimbus-jose-jwt.version}</version>
             </dependency>
             <dependency>
+                <groupId>com.nimbusds</groupId>
+                <artifactId>lang-tag</artifactId>
+                <version>${lang-tag.version}</version>
+            </dependency>
+
+            <dependency>
                 <groupId>net.minidev</groupId>
                 <artifactId>json-smart</artifactId>
                 <version>${json-smart.version}</version>