diff --git a/asterix-external-data/pom.xml b/asterix-external-data/pom.xml
index 9a8540f..8c59cc4 100644
--- a/asterix-external-data/pom.xml
+++ b/asterix-external-data/pom.xml
@@ -213,12 +213,12 @@
         <dependency>
             <groupId>org.twitter4j</groupId>
             <artifactId>twitter4j-core</artifactId>
-            <version>[4.0,)</version>
+            <version>4.0.3</version>
         </dependency>
         <dependency>
             <groupId>org.twitter4j</groupId>
             <artifactId>twitter4j-stream</artifactId>
-            <version>[4.0,)</version>
+            <version>4.0.3</version>
         </dependency>
         <dependency>
             <groupId>org.apache.hadoop</groupId>
diff --git a/asterix-lang-common/pom.xml b/asterix-lang-common/pom.xml
index d1a5f80..dd5035f 100644
--- a/asterix-lang-common/pom.xml
+++ b/asterix-lang-common/pom.xml
@@ -76,8 +76,8 @@
         </dependency>
         <dependency>
             <groupId>xerces</groupId>
-            <artifactId>xerces</artifactId>
-            <version>2.4.0</version>
+            <artifactId>xercesImpl</artifactId>
+            <version>2.9.1</version>
         </dependency>
     </dependencies>
 
diff --git a/asterix-runtime/pom.xml b/asterix-runtime/pom.xml
index 6414139..1914336 100644
--- a/asterix-runtime/pom.xml
+++ b/asterix-runtime/pom.xml
@@ -59,16 +59,6 @@
             <scope>compile</scope>
         </dependency>
         <dependency>
-            <groupId>org.twitter4j</groupId>
-            <artifactId>twitter4j-core</artifactId>
-            <version>[4.0,)</version>
-        </dependency>
-        <dependency>
-            <groupId>org.twitter4j</groupId>
-            <artifactId>twitter4j-stream</artifactId>
-            <version>[4.0,)</version>
-        </dependency>
-        <dependency>
             <groupId>org.apache.hadoop</groupId>
             <artifactId>hadoop-client</artifactId>
             <type>jar</type>