diff --git a/gerrit-httpd/src/main/java/com/google/gerrit/httpd/restapi/RestApiServlet.java b/gerrit-httpd/src/main/java/com/google/gerrit/httpd/restapi/RestApiServlet.java
index b7528b5..45144d7 100644
--- a/gerrit-httpd/src/main/java/com/google/gerrit/httpd/restapi/RestApiServlet.java
+++ b/gerrit-httpd/src/main/java/com/google/gerrit/httpd/restapi/RestApiServlet.java
@@ -103,6 +103,7 @@
 import java.io.BufferedReader;
 import java.io.BufferedWriter;
 import java.io.EOFException;
+import java.io.FilterOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
@@ -740,10 +741,16 @@
       b64 = new BinaryResult() {
         @Override
         public void writeTo(OutputStream out) throws IOException {
-          OutputStream e = BaseEncoding.base64().encodingStream(
-              new OutputStreamWriter(out, ISO_8859_1));
-          src.writeTo(e);
-          e.flush();
+          try (OutputStreamWriter w = new OutputStreamWriter(
+                new FilterOutputStream(out) {
+                  @Override
+                  public void close() {
+                    // Do not close out, but only w and e.
+                  }
+                }, ISO_8859_1);
+              OutputStream e = BaseEncoding.base64().encodingStream(w)) {
+            src.writeTo(e);
+          }
         }
       };
     }
diff --git a/lib/jgit/BUCK b/lib/jgit/BUCK
index a658fc3..ff73888 100644
--- a/lib/jgit/BUCK
+++ b/lib/jgit/BUCK
@@ -1,13 +1,13 @@
 include_defs('//lib/maven.defs')
 
-REPO = GERRIT  # Leave here even if set to MAVEN_CENTRAL.
-VERS = '3.7.0.201502260915-r.58-g65c379e'
+REPO = MAVEN_CENTRAL # Leave here even if set to MAVEN_CENTRAL.
+VERS = '3.7.1.201504261725-r'
 
 maven_jar(
   name = 'jgit',
   id = 'org.eclipse.jgit:org.eclipse.jgit:' + VERS,
-  bin_sha1 = '8fc9620ec499169facad3355f7417eb6a8aff511',
-  src_sha1 = '40bd9ae8af8e0b03eb4e43f44f5feda8b7325221',
+  bin_sha1 = '28bae05826c1a34381826fb1d9ea5fd0ec47cc67',
+  src_sha1 = 'ef46620a8981d49eef2b27090ada4ca80a2b9766',
   license = 'jgit',
   repository = REPO,
   unsign = True,
@@ -22,7 +22,7 @@
 maven_jar(
   name = 'jgit-servlet',
   id = 'org.eclipse.jgit:org.eclipse.jgit.http.server:' + VERS,
-  sha1 = 'cecc2b9c0b94455348c3a0c63eb83f72cc595757',
+  sha1 = '874137fe9417c23cd0225ee6b86a13366b58b16e',
   license = 'jgit',
   repository = REPO,
   deps = [':jgit'],
@@ -36,7 +36,7 @@
 maven_jar(
   name = 'jgit-archive',
   id = 'org.eclipse.jgit:org.eclipse.jgit.archive:' + VERS,
-  sha1 = '7ccc7c78bf47566045ea7a3c08508ba18e4684ca',
+  sha1 = '8aab2d5d8deeaa8345d6df456de215b3d973c4b2',
   license = 'jgit',
   repository = REPO,
   deps = [':jgit',
@@ -53,7 +53,7 @@
 maven_jar(
   name = 'junit',
   id = 'org.eclipse.jgit:org.eclipse.jgit.junit:' + VERS,
-  sha1 = '87d64d722447dc3971ace30d2a72593c72a4d05f',
+  sha1 = '7ab2c3f5f40d07c84e7305b0fd60a8006257639c',
   license = 'DO_NOT_DISTRIBUTE',
   repository = REPO,
   unsign = True,