diff --git a/ch08-geotime/pom.xml b/ch08-geotime/pom.xml
index 67733eba..e9c15c75 100644
--- a/ch08-geotime/pom.xml
+++ b/ch08-geotime/pom.xml
@@ -25,7 +25,7 @@
     </dependency>
     <dependency>
       <groupId>com.github.nscala-time</groupId>
-      <artifactId>nscala-time_2.9.1</artifactId>
+      <artifactId>nscala-time_2.10</artifactId>
     </dependency>
     <dependency>
       <groupId>com.esri.geometry</groupId>
diff --git a/ch09-risk/pom.xml b/ch09-risk/pom.xml
index 26ea50ec..ea356624 100644
--- a/ch09-risk/pom.xml
+++ b/ch09-risk/pom.xml
@@ -30,7 +30,7 @@
     </dependency>
     <dependency>
       <groupId>com.github.nscala-time</groupId>
-      <artifactId>nscala-time_2.9.1</artifactId>
+      <artifactId>nscala-time_2.10</artifactId>
     </dependency>
   </dependencies>
 
diff --git a/pom.xml b/pom.xml
index 115c68a7..463f0a1c 100644
--- a/pom.xml
+++ b/pom.xml
@@ -118,8 +118,8 @@
       </dependency>
       <dependency>
         <groupId>com.github.nscala-time</groupId>
-        <artifactId>nscala-time_2.9.1</artifactId>
-        <version>1.4.0</version>
+        <artifactId>nscala-time_2.10</artifactId>
+        <version>1.8.0</version>
       </dependency>
     </dependencies>
   </dependencyManagement>