diff --git a/src/noosfero-spb-theme/css/modal.css b/src/noosfero-spb-theme/css/modal.css
index 58752e1..75bfa2c 100644
--- a/src/noosfero-spb-theme/css/modal.css
+++ b/src/noosfero-spb-theme/css/modal.css
@@ -9,6 +9,7 @@
   overflow: hidden;
   outline: 0px none;
   background-color: rgba(0, 0, 0, 0.5);
+  height: 100%;
 }
 
 .modal-open .modal {
@@ -26,8 +27,8 @@
 }
 
 .modal-dialog {
-  width: 600px;
-  margin: 60px auto;
+  width: 45%;
+  margin: 12% auto 0% auto;
   position: relative;
 }
 
@@ -82,8 +83,8 @@
 }
 
 .modal-title {
-  margin: 0px;
-  line-height: 1.42857;
+  margin: 0px !important;
+  line-height: 1.42857 !important;
 }
 
 .modal-body {
--
libgit2 0.21.2