diff --git a/app/classes/Framadate/Migration/AddColumn_hidden_In_poll_For_0_9.php b/app/classes/Framadate/Migration/AddColumn_hidden_In_poll_For_0_9.php
index c046752..dd335f9 100644
--- a/app/classes/Framadate/Migration/AddColumn_hidden_In_poll_For_0_9.php
+++ b/app/classes/Framadate/Migration/AddColumn_hidden_In_poll_For_0_9.php
@@ -37,7 +37,7 @@ class AddColumn_hidden_In_poll_For_0_9 implements Migration {
      * @return string The description of the migration class
      */
     function description() {
-        return "Add column \"hidden\" in table \"vote\" for version 0.9";
+        return 'Add column "hidden" in table "vote" for version 0.9';
     }
 
     /**
diff --git a/app/classes/Framadate/Migration/AddColumn_receiveNewComments_For_0_9.php b/app/classes/Framadate/Migration/AddColumn_receiveNewComments_For_0_9.php
index 9f698f9..865502a 100644
--- a/app/classes/Framadate/Migration/AddColumn_receiveNewComments_For_0_9.php
+++ b/app/classes/Framadate/Migration/AddColumn_receiveNewComments_For_0_9.php
@@ -37,7 +37,7 @@ class AddColumn_receiveNewComments_For_0_9 implements Migration {
      * @return string The description of the migration class
      */
     function description() {
-        return "Add column \"receiveNewComments\" for version 0.9";
+        return 'Add column "receiveNewComments" for version 0.9';
     }
 
     /**
diff --git a/app/classes/Framadate/Migration/AddColumn_uniqId_In_vote_For_0_9.php b/app/classes/Framadate/Migration/AddColumn_uniqId_In_vote_For_0_9.php
index 9f50e4a..440d2de 100644
--- a/app/classes/Framadate/Migration/AddColumn_uniqId_In_vote_For_0_9.php
+++ b/app/classes/Framadate/Migration/AddColumn_uniqId_In_vote_For_0_9.php
@@ -37,7 +37,7 @@ class AddColumn_uniqId_In_vote_For_0_9 implements Migration {
      * @return string The description of the migration class
      */
     function description() {
-        return "Add column \"uniqId\" in table \"vote\" for version 0.9";
+        return 'Add column "uniqId" in table "vote" for version 0.9';
     }
 
     /**
diff --git a/app/classes/Framadate/Migration/From_0_0_to_0_8_Migration.php b/app/classes/Framadate/Migration/From_0_0_to_0_8_Migration.php
index 4e0c0e8..ac985f5 100644
--- a/app/classes/Framadate/Migration/From_0_0_to_0_8_Migration.php
+++ b/app/classes/Framadate/Migration/From_0_0_to_0_8_Migration.php
@@ -37,7 +37,7 @@ class From_0_0_to_0_8_Migration implements Migration {
      * @return string The description of the migration class
      */
     function description() {
-        return "First installation of the Framadate application (v0.8)";
+        return 'First installation of the Framadate application (v0.8)';
     }
 
     /**
diff --git a/app/classes/Framadate/Migration/From_0_8_to_0_9_Migration.php b/app/classes/Framadate/Migration/From_0_8_to_0_9_Migration.php
index 2920bd3..bed4fe8 100644
--- a/app/classes/Framadate/Migration/From_0_8_to_0_9_Migration.php
+++ b/app/classes/Framadate/Migration/From_0_8_to_0_9_Migration.php
@@ -37,7 +37,7 @@ class From_0_8_to_0_9_Migration implements Migration {
      * @return string The description of the migration class
      */
     function description() {
-        return "From 0.8 to 0.9";
+        return 'From 0.8 to 0.9';
     }
 
     /**