diff --git a/build.versions b/build.versions
index 3d8ed46..c9d67a3 100644
--- a/build.versions
+++ b/build.versions
@@ -58,10 +58,10 @@
 ch.qos.logback.core=1.0.0.v20111214-2030
 ch.qos.logback.classic=1.0.0.v20111214-2030
 ch.qos.logback.slf4j=1.0.0.v20120123-1500
-org.slf4j.api=1.6.1.v20100831-0715
-org.slf4j.jul=1.6.1.v20100831-0715
-org.slf4j.jcl=1.6.1.v20100831-0715
-org.slf4j.log4j=1.6.1.v20100831-0715
+org.slf4j.api=1.6.4.v20120130-2120
+org.slf4j.jul=1.6.4.v20120130-2120
+org.slf4j.jcl=1.6.4.v20120130-2120
+org.slf4j.log4j=1.6.4.v20120130-2120
 javax.servlet=3.0.0.v201112011016
 javax.mail=1.4.0.v201005080615
 javax.jms=1.1.0.v201205091237