diff --git a/plugins/libkolab/SQL/mysql.initial.sql b/plugins/libkolab/SQL/mysql.initial.sql
index 80da02fa..a2d54a33 100644
--- a/plugins/libkolab/SQL/mysql.initial.sql
+++ b/plugins/libkolab/SQL/mysql.initial.sql
@@ -12,7 +12,7 @@ DROP TABLE IF EXISTS `kolab_folders`;
 
 CREATE TABLE `kolab_folders` (
   `folder_id` BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
-  `resource` VARCHAR(255) NOT NULL,
+  `resource` VARCHAR(255) BINARY NOT NULL,
   `type` VARCHAR(32) NOT NULL,
   `synclock` INT(10) NOT NULL DEFAULT '0',
   `ctag` VARCHAR(40) DEFAULT NULL,
@@ -180,4 +180,4 @@ CREATE TABLE `kolab_cache_freebusy` (
 
 /*!40014  SET FOREIGN_KEY_CHECKS=1 */;
 
-REPLACE INTO `system` (`name`, `value`) VALUES ('libkolab-version', '2018122700');
+REPLACE INTO `system` (`name`, `value`) VALUES ('libkolab-version', '2019092900');
diff --git a/plugins/libkolab/SQL/mysql/2019092900.sql b/plugins/libkolab/SQL/mysql/2019092900.sql
new file mode 100644
index 00000000..f61e13d9
--- /dev/null
+++ b/plugins/libkolab/SQL/mysql/2019092900.sql
@@ -0,0 +1 @@
+ALTER TABLE `kolab_folders` CHANGE `resource` `resource` varchar(255) BINARY NOT NULL;
diff --git a/plugins/libkolab/SQL/oracle.initial.sql b/plugins/libkolab/SQL/oracle.initial.sql
index ebba60dc..5b9a07d1 100644
--- a/plugins/libkolab/SQL/oracle.initial.sql
+++ b/plugins/libkolab/SQL/oracle.initial.sql
@@ -175,4 +175,4 @@ CREATE TABLE "kolab_cache_freebusy" (
 CREATE INDEX "kolab_cache_fb_uid2msguid" ON "kolab_cache_freebusy" ("folder_id", "uid", "msguid");
 
 
-INSERT INTO "system" ("name", "value") VALUES ('libkolab-version', '2018122700');
+INSERT INTO "system" ("name", "value") VALUES ('libkolab-version', '2019092900');
diff --git a/plugins/libkolab/SQL/oracle/2019092900.sql b/plugins/libkolab/SQL/oracle/2019092900.sql
new file mode 100644
index 00000000..fe6741a0
--- /dev/null
+++ b/plugins/libkolab/SQL/oracle/2019092900.sql
@@ -0,0 +1 @@
+-- empty
\ No newline at end of file
diff --git a/plugins/libkolab/SQL/sqlite.initial.sql b/plugins/libkolab/SQL/sqlite.initial.sql
index 815316dc..745fdfdb 100644
--- a/plugins/libkolab/SQL/sqlite.initial.sql
+++ b/plugins/libkolab/SQL/sqlite.initial.sql
@@ -148,4 +148,4 @@ CREATE TABLE kolab_cache_freebusy (
 
 CREATE INDEX ix_freebusy_uid2msguid ON kolab_cache_freebusy(folder_id,uid,msguid);
 
-INSERT INTO system (name, value) VALUES ('libkolab-version', '2018122700');
+INSERT INTO system (name, value) VALUES ('libkolab-version', '2019092900');
diff --git a/plugins/libkolab/SQL/sqlite/2019092900.sql b/plugins/libkolab/SQL/sqlite/2019092900.sql
new file mode 100644
index 00000000..fe6741a0
--- /dev/null
+++ b/plugins/libkolab/SQL/sqlite/2019092900.sql
@@ -0,0 +1 @@
+-- empty
\ No newline at end of file