diff --git a/pom.xml b/pom.xml
index a8b8849ee92d4ce34c35622fa5ad5e8e8a778fb1..600620afc3cb10969ea3909b57f904978b7e61ef 100644
--- a/pom.xml
+++ b/pom.xml
@@ -39,7 +39,7 @@
<rugged.jgit.buildnumber.version>1.2.10</rugged.jgit.buildnumber.version>
<rugged.plantuml.version>7999</rugged.plantuml.version>
<rugged.orekit.version>9.0-SNAPSHOT</rugged.orekit.version>
- <rugged.hipparchus.version>1.1-SNAPSHOT</rugged.hipparchus.version>
+ <rugged.hipparchus.version>1.1</rugged.hipparchus.version>
<rugged.compiler.source>1.8</rugged.compiler.source>
<rugged.compiler.target>1.8</rugged.compiler.target>
<rugged.implementation.build>${git.revision}; ${maven.build.timestamp}</rugged.implementation.build>
diff --git a/src/site/xdoc/changes.xml b/src/site/xdoc/changes.xml
index aedffbf56587d5cfefba9b0797c7b2fffa30c59f..5552d5f7f474d2b4003653cf5715164b1c9c3e60 100644
--- a/src/site/xdoc/changes.xml
+++ b/src/site/xdoc/changes.xml
@@ -21,6 +21,9 @@
</properties>
<body>
<release version="2.0" date="TBD" description="TTBD">
+ <action dev="luc" type="update">
+ Updated dependency to Hipparchus 1.1, released on 2017, March 16th.
+ </action>
<action dev="luc" type="add" due-to="Sergio Esteves">
Added atmospheric refraction.
This work was done under the frame of ESA SOCIS 2016 program.