diff --git a/.gitignore b/.gitignore
index 76f333f..7a84f66 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,4 @@
 /tests-1.4.4.tar.bz2
 /underscore-1.4.4.tgz
+/tests-1.5.1.tar.bz2
+/underscore-1.5.1.tgz
diff --git a/dl-tests.sh b/dl-tests.sh
old mode 100755
new mode 100644
index beb0026..69de284
--- a/dl-tests.sh
+++ b/dl-tests.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-tag=1.4.4
+tag=1.5.1
 
 set -e
 
diff --git a/nodejs-underscore.spec b/nodejs-underscore.spec
index 59fb92e..20977b0 100644
--- a/nodejs-underscore.spec
+++ b/nodejs-underscore.spec
@@ -3,8 +3,8 @@
 %global enable_tests 0
 
 Name:       nodejs-underscore
-Version:    1.4.4
-Release:    3%{?dist}
+Version:    1.5.1
+Release:    1%{?dist}
 Summary:    JavaScript's functional programming helper library
 License:    MIT
 Group:      System Environment/Libraries
@@ -17,7 +17,7 @@ Source1:    tests-%{version}.tar.bz2
 Source10:   dl-tests.sh
 BuildArch:  noarch
 
-BuildRequires:  nodejs-devel
+BuildRequires:  nodejs-packaging
 
 %if 0%{?enable_tests}
 BuildRequires:  npm(phantomjs)
@@ -32,15 +32,16 @@ extending any core JavaScript objects.
 %prep
 %setup -q -n package
 %setup -T -D -a 1 -q -n package
+rm -f underscore-min.*
 
 
 %build
-#nothing to do
+uglifyjs underscore.js -m --source-map underscore-min.map -o underscore-min.js
 
 
 %install
 mkdir -p %{buildroot}%{nodejs_sitelib}/underscore
-cp -pr package.json index.js underscore.js underscore-min.js \
+cp -pr package.json index.js underscore.js underscore-min.js underscore-min.map \
     %{buildroot}%{nodejs_sitelib}/underscore
 
 # No dependencies.
@@ -49,7 +50,7 @@ cp -pr package.json index.js underscore.js underscore-min.js \
 
 %if 0%{?enable_tests}
 %check
-ln -sf %{nodejs_sitelib} .
+%nodejs_symlink_deps --check
 %{nodejs_sitelib}/phantomjs/bin/phantomjs \
     test/vendor/runner.js test/index.html?noglobals=true
 %endif
@@ -61,6 +62,10 @@ ln -sf %{nodejs_sitelib} .
 
 
 %changelog
+* Sun Aug 18 2013 Jamie Nguyen <jamielinux@fedoraproject.org> - 1.5.1-1
+- update to upstream release 1.5.1
+- remove pre-compiled JS and use uglifyjs to compile
+
 * Sat Aug 03 2013 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 1.4.4-3
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_20_Mass_Rebuild
 
diff --git a/sources b/sources
index 0d52a2c..b2cee61 100644
--- a/sources
+++ b/sources
@@ -1,2 +1,2 @@
-f3d6a69153074b3205df96960f43ca66  tests-1.4.4.tar.bz2
-b3f32b8c28916abc21eed67d0d7f91c8  underscore-1.4.4.tgz
+bb44857865aa035a67375b13381eedb3  tests-1.5.1.tar.bz2
+8c4cc09e37517dc6b387d3ca00c6b593  underscore-1.5.1.tgz