diff --git a/build/Firmata-2.5.2.zip.sha b/build/Firmata-2.5.2.zip.sha
deleted file mode 100644
index bacad22e8..000000000
--- a/build/Firmata-2.5.2.zip.sha
+++ /dev/null
@@ -1 +0,0 @@
-8d532ab31066aaadc327463b7c94efee9d4cd8d3
diff --git a/build/Firmata-2.5.3.zip.sha b/build/Firmata-2.5.3.zip.sha
new file mode 100644
index 000000000..a2fbba090
--- /dev/null
+++ b/build/Firmata-2.5.3.zip.sha
@@ -0,0 +1 @@
+43bbb7cc6332bf2edc3637919a6381e518c82c2e
diff --git a/build/build.xml b/build/build.xml
index dc297162e..62ddc11cd 100644
--- a/build/build.xml
+++ b/build/build.xml
@@ -221,7 +221,7 @@
       <fileset dir="../libraries"/>
     </copy>
 
-    <download-library name="Firmata" version="2.5.2"/>
+    <download-library name="Firmata" version="2.5.3"/>
     <download-library name="Bridge" version="1.6.2"/>
     <download-library name="Robot_Control" version="1.0.2"/>
     <download-library name="Robot_Motor" version="1.0.2"/>