diff --git a/htrace-zipkin/pom.xml b/htrace-zipkin/pom.xml
index d4225f0..3727513 100644
--- a/htrace-zipkin/pom.xml
+++ b/htrace-zipkin/pom.xml
@@ -27,6 +27,7 @@ language governing permissions and limitations under the License. -->
UTF-8
+ 1.5.8
@@ -140,11 +141,19 @@ language governing permissions and limitations under the License. -->
libthrift
0.9.0
+
org.slf4j
slf4j-nop
- 1.5.8
+ ${slf4j.version}
+
+
+ org.slf4j
+ slf4j-api
+ ${slf4j.version}
+
+
commons-codec
commons-codec