diff --git a/composer.json b/composer.json
index 9d37d5d82fdb54cbeb76326fca65a6beac9bc22c..c73668828e224832bea57377db497cd57702ee6d 100644
--- a/composer.json
+++ b/composer.json
@@ -48,26 +48,26 @@
     ],
     "require": {
         "aferrandini/phpqrcode": "1.0.1",
-        "jasig/phpcas": "*",
+        "jasig/phpcas": "1.3.3",
         "johnwohlers/sip2": "dev-master",
-        "los/losrecaptcha": "*",
+        "los/losrecaptcha": "1.0.0",
         "mobileesp/mdetect": "dev-master",
-        "ocramius/proxy-manager": "*",
-        "oyejorge/less.php": "*",
-        "pear-pear.php.net/file_marc": "*",
-        "pear-pear.php.net/pear": "*",
-        "pear-pear.php.net/validate_ispn": "*",
-        "serialssolutions/summon": "*",
-        "symfony/yaml": "*",
-        "vufind-org/vufindcode": "*",
-        "vufind-org/vufindhttp": "*",
+        "ocramius/proxy-manager": "1.0.2",
+        "oyejorge/less.php": "1.7.0.5",
+        "pear-pear.php.net/file_marc": "1.1.1",
+        "pear-pear.php.net/pear": "1.9.5",
+        "pear-pear.php.net/validate_ispn": "0.6.1",
+        "serialssolutions/summon": "1.0.0",
+        "symfony/yaml": "2.7.3",
+        "vufind-org/vufindcode": "1.0.2",
+        "vufind-org/vufindhttp": "2.0.0",
         "zendframework/zendframework": "2.4.6",
-        "zendframework/zendrest": "2.*",
-        "zendframework/zendservice-amazon": "2.*",
-        "zf-commons/zfc-rbac": "~2.4"
+        "zendframework/zendrest": "2.0.2",
+        "zendframework/zendservice-amazon": "2.0.4",
+        "zf-commons/zfc-rbac": "2.5.2"
     },
     "require-dev": {
-        "behat/mink": "1.6.*",
-        "behat/mink-zombie-driver": "*"
+        "behat/mink": "1.6.1",
+        "behat/mink-zombie-driver": "1.2.0"
     }
 }