diff --git a/examples/pom.xml b/examples/pom.xml
index 94b362dd865..11ddb1b71d6 100644
--- a/examples/pom.xml
+++ b/examples/pom.xml
@@ -73,6 +73,12 @@
         <dependency>
             <groupId>com.maxmind.geoip2</groupId>
             <artifactId>geoip2</artifactId>
+            <exclusions>
+                <exclusion>
+                    <groupId>com.google.guava</groupId>
+                    <artifactId>guava</artifactId>
+                </exclusion>
+            </exclusions>
         </dependency>
 
         <!-- For tests! -->
diff --git a/extensions-core/avro-extensions/pom.xml b/extensions-core/avro-extensions/pom.xml
index 5e40d28ad62..2e9f69e8036 100644
--- a/extensions-core/avro-extensions/pom.xml
+++ b/extensions-core/avro-extensions/pom.xml
@@ -54,6 +54,10 @@
       <artifactId>avro</artifactId>
       <version>${avro.version}</version>
       <exclusions>
+        <exclusion>
+          <groupId>org.slf4j</groupId>
+          <artifactId>slf4j-api</artifactId>
+        </exclusion>
         <exclusion>
           <groupId>org.codehaus.jackson</groupId>
           <artifactId>jackson-core-asl</artifactId>
@@ -78,6 +82,10 @@
           <groupId>org.codehaus.jackson</groupId>
           <artifactId>jackson-mapper-asl</artifactId>
         </exclusion>
+        <exclusion>
+          <groupId>org.slf4j</groupId>
+          <artifactId>slf4j-api</artifactId>
+        </exclusion>
       </exclusions>
     </dependency>
     <dependency>
@@ -91,6 +99,10 @@
       <artifactId>schema-repo-api</artifactId>
       <version>${schemarepo.version}</version>
       <exclusions>
+        <exclusion>
+          <groupId>org.slf4j</groupId>
+          <artifactId>slf4j-api</artifactId>
+        </exclusion>
         <exclusion>
           <groupId>com.google.guava</groupId>
           <artifactId>guava</artifactId>
@@ -106,6 +118,12 @@
       <groupId>org.schemarepo</groupId>
       <artifactId>schema-repo-avro</artifactId>
       <version>${schemarepo.version}</version>
+      <exclusions>
+        <exclusion>
+          <groupId>org.apache.avro</groupId>
+          <artifactId>avro</artifactId>
+        </exclusion>
+      </exclusions>
     </dependency>
     <dependency>
       <groupId>io.confluent</groupId>
@@ -116,6 +134,10 @@
           <groupId>org.slf4j</groupId>
           <artifactId>slf4j-log4j12</artifactId>
         </exclusion>
+        <exclusion>
+          <groupId>org.apache.avro</groupId>
+          <artifactId>avro</artifactId>
+        </exclusion>
         <exclusion>
           <groupId>com.fasterxml.jackson.core</groupId>
           <artifactId>jackson-databind</artifactId>
diff --git a/extensions-core/druid-bloom-filter/pom.xml b/extensions-core/druid-bloom-filter/pom.xml
index 59084fca691..c45875db8ca 100644
--- a/extensions-core/druid-bloom-filter/pom.xml
+++ b/extensions-core/druid-bloom-filter/pom.xml
@@ -51,6 +51,12 @@
       <groupId>org.apache.hive</groupId>
       <artifactId>hive-storage-api</artifactId>
       <version>2.7.0</version>
+      <exclusions>
+        <exclusion>
+          <groupId>org.slf4j</groupId>
+          <artifactId>slf4j-api</artifactId>
+        </exclusion>
+      </exclusions>
     </dependency>
 
     <!-- Tests -->
diff --git a/extensions-core/druid-kerberos/pom.xml b/extensions-core/druid-kerberos/pom.xml
index aac05a97f7c..ad27a22528f 100644
--- a/extensions-core/druid-kerberos/pom.xml
+++ b/extensions-core/druid-kerberos/pom.xml
@@ -164,6 +164,14 @@
           <groupId>org.apache.curator</groupId>
           <artifactId>curator-client</artifactId>
         </exclusion>
+        <exclusion>
+          <groupId>org.apache.curator</groupId>
+          <artifactId>curator-framework</artifactId>
+        </exclusion>
+        <exclusion>
+          <groupId>org.apache.curator</groupId>
+          <artifactId>curator-recipes</artifactId>
+        </exclusion>
         <exclusion>
           <groupId>org.apache.commons</groupId>
           <artifactId>commons-math3</artifactId>
diff --git a/extensions-core/hdfs-storage/pom.xml b/extensions-core/hdfs-storage/pom.xml
index 13aaccc499f..e0795e1b050 100644
--- a/extensions-core/hdfs-storage/pom.xml
+++ b/extensions-core/hdfs-storage/pom.xml
@@ -133,6 +133,14 @@
                 <groupId>org.apache.curator</groupId>
                 <artifactId>curator-client</artifactId>
               </exclusion>
+              <exclusion>
+                <groupId>org.apache.curator</groupId>
+                <artifactId>curator-framework</artifactId>
+              </exclusion>
+              <exclusion>
+                <groupId>org.apache.curator</groupId>
+                <artifactId>curator-recipes</artifactId>
+              </exclusion>
               <exclusion>
                 <groupId>org.apache.commons</groupId>
                 <artifactId>commons-math3</artifactId>
diff --git a/extensions-core/kinesis-indexing-service/pom.xml b/extensions-core/kinesis-indexing-service/pom.xml
index db79d856671..8469334641a 100644
--- a/extensions-core/kinesis-indexing-service/pom.xml
+++ b/extensions-core/kinesis-indexing-service/pom.xml
@@ -57,6 +57,13 @@
             <groupId>com.amazonaws</groupId>
             <artifactId>aws-java-sdk-kinesis</artifactId>
             <version>${aws.sdk.version}</version>
+            <exclusions>
+                <!-- aws-java-sdk-core is provided by Druid core. -->
+                <exclusion>
+                    <groupId>com.amazonaws</groupId>
+                    <artifactId>aws-java-sdk-core</artifactId>
+                </exclusion>
+            </exclusions>
         </dependency>
 
         <dependency>
diff --git a/extensions-core/protobuf-extensions/pom.xml b/extensions-core/protobuf-extensions/pom.xml
index 50649caf3ea..fcb28207438 100644
--- a/extensions-core/protobuf-extensions/pom.xml
+++ b/extensions-core/protobuf-extensions/pom.xml
@@ -55,6 +55,12 @@
       <groupId>com.google.protobuf</groupId>
       <artifactId>protobuf-java-util</artifactId>
       <version>${protobuf.version}</version>
+      <exclusions>
+        <exclusion>
+          <groupId>com.google.guava</groupId>
+          <artifactId>guava</artifactId>
+        </exclusion>
+      </exclusions>
     </dependency>
     <dependency>
       <groupId>com.github.os72</groupId>