diff --git a/casic-web/pom.xml b/casic-web/pom.xml
index 624ab45..45d4674 100644
--- a/casic-web/pom.xml
+++ b/casic-web/pom.xml
@@ -183,7 +183,7 @@
         <dependency>
             <groupId>javax.servlet</groupId>
             <artifactId>javax.servlet-api</artifactId>
-            <version>3.1.0</version>
+            <version>${servlet-api.version}</version>
             <scope>provided</scope>
         </dependency>
     </dependencies>

diff --git a/casic-web/pom.xml b/casic-web/pom.xml
index 624ab45..45d4674 100644
--- a/casic-web/pom.xml
+++ b/casic-web/pom.xml
@@ -183,7 +183,7 @@
         <dependency>
             <groupId>javax.servlet</groupId>
             <artifactId>javax.servlet-api</artifactId>
-            <version>3.1.0</version>
+            <version>${servlet-api.version}</version>
             <scope>provided</scope>
         </dependency>
     </dependencies>
diff --git a/pom.xml b/pom.xml
index e4eed6d..6df4cdd 100644
--- a/pom.xml
+++ b/pom.xml
@@ -44,7 +44,6 @@
         <commons-lang3.version>3.6</commons-lang3.version>
         <ehcache.core.version>2.6.11</ehcache.core.version>
         <mysql-connector-java.version>5.1.38</mysql-connector-java.version>
-        <hikari.version>3.4.5</hikari.version>
     </properties>
 
     <dependencyManagement>