diff --git a/jtalks-common-model/pom.xml b/jtalks-common-model/pom.xml
index addc50ed..0f89a268 100644
--- a/jtalks-common-model/pom.xml
+++ b/jtalks-common-model/pom.xml
@@ -20,11 +20,6 @@
   </properties>
 
   <dependencies>
-    <!--javatalks dependencies -->
-    <dependency>
-      <groupId>ru.javatalks.utils</groupId>
-      <artifactId>core-utils</artifactId>
-    </dependency>
     <!--spring -->
     <dependency>
       <groupId>org.springframework</groupId>
diff --git a/jtalks-common-model/src/main/java/ru/javatalks/utils/datetime/DateTimeUtils.java b/jtalks-common-model/src/main/java/ru/javatalks/utils/datetime/DateTimeUtils.java
new file mode 100644
index 00000000..45edf2e6
--- /dev/null
+++ b/jtalks-common-model/src/main/java/ru/javatalks/utils/datetime/DateTimeUtils.java
@@ -0,0 +1,9 @@
+package ru.javatalks.utils.datetime;
+
+import org.joda.time.DateTime;
+
+public class DateTimeUtils {
+    public DateTime getNow() {
+        return new DateTime();
+    }
+}
diff --git a/jtalks-common-model/src/main/java/ru/javatalks/utils/datetime/DateTimeUtilsFactory.java b/jtalks-common-model/src/main/java/ru/javatalks/utils/datetime/DateTimeUtilsFactory.java
new file mode 100644
index 00000000..2ab7b6b6
--- /dev/null
+++ b/jtalks-common-model/src/main/java/ru/javatalks/utils/datetime/DateTimeUtilsFactory.java
@@ -0,0 +1,7 @@
+package ru.javatalks.utils.datetime;
+
+public class DateTimeUtilsFactory {
+    public static DateTimeUtils getDateTimeUtils() {
+        return new DateTimeUtils();
+    }
+}
diff --git a/jtalks-common-model/src/main/java/ru/javatalks/utils/general/Assert.java b/jtalks-common-model/src/main/java/ru/javatalks/utils/general/Assert.java
new file mode 100644
index 00000000..9fe4da16
--- /dev/null
+++ b/jtalks-common-model/src/main/java/ru/javatalks/utils/general/Assert.java
@@ -0,0 +1,8 @@
+package ru.javatalks.utils.general;
+
+public class Assert {
+    public static void throwIfNull(Object v, String message) {
+        if(v == null)
+            throw new IllegalArgumentException(message);
+    }
+}
diff --git a/jtalks-common-security/pom.xml b/jtalks-common-security/pom.xml
index e2efdd06..e01f8da9 100644
--- a/jtalks-common-security/pom.xml
+++ b/jtalks-common-security/pom.xml
@@ -52,10 +52,6 @@
       <groupId>joda-time</groupId>
       <artifactId>joda-time</artifactId>
     </dependency>
-    <dependency>
-      <groupId>ru.javatalks.utils</groupId>
-      <artifactId>core-utils</artifactId>
-    </dependency>
   </dependencies>
 
 </project>
diff --git a/jtalks-common-service/pom.xml b/jtalks-common-service/pom.xml
index 3839d567..24688fac 100644
--- a/jtalks-common-service/pom.xml
+++ b/jtalks-common-service/pom.xml
@@ -46,9 +46,5 @@
       <groupId>joda-time</groupId>
       <artifactId>joda-time</artifactId>
     </dependency>
-    <dependency>
-      <groupId>ru.javatalks.utils</groupId>
-      <artifactId>core-utils</artifactId>
-    </dependency>
   </dependencies>
 </project>
diff --git a/libs/org/springframework/security/spring-security-acl/3.1.1.CI-SNAPSHOT/spring-security-acl-3.1.1.CI-SNAPSHOT.jar b/libs/org/springframework/security/spring-security-acl/3.1.1.CI-SNAPSHOT/spring-security-acl-3.1.1.CI-SNAPSHOT.jar
new file mode 100644
index 00000000..a4df6fd1
Binary files /dev/null and b/libs/org/springframework/security/spring-security-acl/3.1.1.CI-SNAPSHOT/spring-security-acl-3.1.1.CI-SNAPSHOT.jar differ
diff --git a/pom.xml b/pom.xml
index 7d07fea1..d9917666 100644
--- a/pom.xml
+++ b/pom.xml
@@ -147,7 +147,7 @@
       <dependency>
         <groupId>org.springframework.security</groupId>
         <artifactId>spring-security-acl</artifactId>
-        <version>3.1.1.JAVATALKS-PATCH3.RELEASE</version>
+        <version>3.1.1.CI-SNAPSHOT</version>
       </dependency>
       <dependency>
         <groupId>org.springframework.security</groupId>
@@ -276,11 +276,6 @@
         <artifactId>commons-io</artifactId>
         <version>2.0.1</version>
       </dependency>
-      <dependency>
-        <groupId>ru.javatalks.utils</groupId>
-        <artifactId>core-utils</artifactId>
-        <version>0.1</version>
-      </dependency>
   
       <!-- Collections -->
       <dependency>
@@ -293,6 +288,14 @@
         <artifactId>guava</artifactId>
         <version>10.0.1</version>
       </dependency>
+<!--      <dependency>-->
+<!--        <groupId>org.springframework.security</groupId>-->
+<!--        <artifactId>spring-security-acl</artifactId>-->
+<!--        <version>3.1.1.JAVATALKS-PATCH3.RELEASE</version>-->
+<!--        <scope>system</scope>-->
+<!--        <systemPath>${project.basedir}/libs/spring-security-acl-3.1.1.CI-SNAPSHOT.jar</systemPath>-->
+<!--        &lt;!&ndash;        <systemPath>/Users/stas/projects/jtalks-common/libs/spring-security-acl-3.1.1.CI-SNAPSHOT.jar</systemPath>&ndash;&gt;-->
+<!--      </dependency>-->
     </dependencies>
   </dependencyManagement>
 
@@ -415,6 +418,10 @@
     <tag>jtalks-common-0.60</tag>
   </scm>
   <repositories>
+    <repository>
+      <id>local</id>
+      <url>file:${project.basedir}/lib</url>
+    </repository>
     <repository>
       <id>jtalks-nexus</id>
       <name>jtalks nexus</name>
@@ -441,7 +448,7 @@
   <properties>
     <copyrightDir>${basedir}</copyrightDir>
     <hibernateVersion>3.6.10.Final</hibernateVersion>
-    <springVersion>3.0.5.RELEASE</springVersion>
+    <springVersion>5.2.2.RELEASE</springVersion>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <maven.javadoc.failOnError>false</maven.javadoc.failOnError>
   </properties>