diff --git a/README.md b/README.md
index 644d0b9..ab2100d 100644
--- a/README.md
+++ b/README.md
@@ -5,9 +5,10 @@ Clickhouse4j - lighter and faster alternative for the official ClickHouse JDBC d
 
 The main differences between this and the official driver are:
 
-- Smaller size. 850kb vs 5.6mb of the original driver (**7x smaller jar size**)
+- Removed Guava, Jackson and Apache Http Client dependencies;
+- Smaller size - 850kb vs 5.6mb of the original driver (**7x smaller jar size**)
 - A bunch of micro optimizations were applied (for example, **batch inserts are now 40% faster**)
-- ```CopyManager``` added;
+- [CopyManager](https://github.com/blynkkk/clickhouse4j/blob/master/src/main/java/cc/blynk/clickhouse/copy/CopyManager.java) added;
 - Compiled against Java 8 and many [other things](https://github.com/blynkkk/clickhouse4j/blob/master/CHANGELOG)
 
 ### Usage
diff --git a/pom.xml b/pom.xml
index 45de7c8..052e2dd 100644
--- a/pom.xml
+++ b/pom.xml
@@ -71,6 +71,11 @@
         <maven-shade-plugin.version>3.2.1</maven-shade-plugin.version>
         <maven-checkstyle-plugin.version>3.0.0</maven-checkstyle-plugin.version>
         <maven-jar-plugin.version>3.1.2</maven-jar-plugin.version>
+        <maven-gpg-plugin.version>1.5</maven-gpg-plugin.version>
+        <maven-deploy-plugin.version>2.8.2</maven-deploy-plugin.version>
+        <maven-release-plugin.version>2.5.3</maven-release-plugin.version>
+        <maven-scm-provider-gitexe.version>1.9.4</maven-scm-provider-gitexe.version>
+        <nexus-staging-maven-plugin.version>1.6.7</nexus-staging-maven-plugin.version>
     </properties>
 
     <dependencies>
@@ -262,7 +267,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-gpg-plugin</artifactId>
-                <version>1.5</version>
+                <version>${maven-gpg-plugin.version}</version>
                 <executions>
                     <execution>
                         <id>sign-artifacts</id>
@@ -276,7 +281,7 @@
 
             <plugin>
                 <artifactId>maven-deploy-plugin</artifactId>
-                <version>2.8.2</version>
+                <version>${maven-deploy-plugin.version}</version>
                 <executions>
                     <execution>
                         <id>default-deploy</id>
@@ -291,7 +296,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-release-plugin</artifactId>
-                <version>2.5.3</version>
+                <version>${maven-release-plugin.version}</version>
                 <configuration>
                     <localCheckout>true</localCheckout>
                     <pushChanges>false</pushChanges>
@@ -302,7 +307,7 @@
                     <dependency>
                         <groupId>org.apache.maven.scm</groupId>
                         <artifactId>maven-scm-provider-gitexe</artifactId>
-                        <version>1.9.4</version>
+                        <version>${maven-scm-provider-gitexe.version}</version>
                     </dependency>
                 </dependencies>
             </plugin>
@@ -310,7 +315,7 @@
             <plugin>
                 <groupId>org.sonatype.plugins</groupId>
                 <artifactId>nexus-staging-maven-plugin</artifactId>
-                <version>1.6.7</version>
+                <version>${nexus-staging-maven-plugin.version}</version>
                 <extensions>true</extensions>
                 <configuration>
                     <serverId>ossrh</serverId>