diff --git a/.travis.yml b/.travis.yml
index 5134844..b6727a5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,9 +2,11 @@
 language: d
 
 d:
+    - dmd-2.080.0
     - dmd-2.078.1
     - dmd-2.077.1
     - ldc-1.7.0
+    - ldc-1.9.0
 os:
     - linux
 env:
diff --git a/dub.json b/dub.json
index 8d4902e..e52cf87 100644
--- a/dub.json
+++ b/dub.json
@@ -6,10 +6,11 @@
 	],
 	"dependencies": {
 		"dauth": "~>0.6.3",
-		"mysql-native": "~>1.1.4",
-		"vibe-d": "~>0.8.2",
-		"vibe-d:tls": "~>0.8.2",
-		"poodinis": "~>8.0.1"
+		"mysql-native": "~>2.2.2",
+		"vibe-d": "~>0.8.3",
+		"vibe-d:tls": "~>0.8.3",
+		"diet-ng": "~>1.4.5",
+		"poodinis": "~>8.0.2"
 	},
     "subConfigurations": {
         "vibe-d:tls": "openssl-1.1"
@@ -19,6 +20,9 @@
 	"license": "MIT",
 	"targetType": "executable",
 	"targetPath": "generated",
+	"versions": [
+		"DietUseCache"
+	],
 	"configurations": [
 		{
 			"name": "executable"
@@ -31,9 +35,8 @@
 			"excludedSourceFiles": ["source/fsicalmanagement/app.d"],
 			"sourcePaths": ["test"],
 			"dependencies": {
-				"unit-threaded": "~>0.7.38"
-			},
-			"versions": ["unitUnthreaded"]
+				"unit-threaded": "~>0.7.45"
+			}
 		}
 	]
 }
diff --git a/dub.selections.json b/dub.selections.json
index 066a25a..5041350 100644
--- a/dub.selections.json
+++ b/dub.selections.json
@@ -4,17 +4,18 @@
 		"botan": "1.12.9",
 		"botan-math": "1.0.3",
 		"dauth": "0.6.3",
-		"diet-ng": "1.4.4",
-		"eventcore": "0.8.27",
+		"diet-ng": "1.4.5",
+		"eventcore": "0.8.34",
 		"libasync": "0.8.3",
 		"libevent": "2.0.2+2.0.16",
 		"memutils": "0.4.10",
-		"mysql-native": "1.1.4",
+		"mysql-native": "2.2.2",
 		"openssl": "1.1.6+1.0.1g",
-		"poodinis": "8.0.1",
-		"taggedalgebraic": "0.10.9",
-		"unit-threaded": "0.7.38",
-		"vibe-core": "1.3.0",
-		"vibe-d": "0.8.2"
+		"poodinis": "8.0.2",
+		"stdx-allocator": "2.77.1",
+		"taggedalgebraic": "0.10.11",
+		"unit-threaded": "0.7.45",
+		"vibe-core": "1.4.0",
+		"vibe-d": "0.8.3"
 	}
 }
diff --git a/source/fsicalmanagement/authenticator.d b/source/fsicalmanagement/authenticator.d
index 19d31f0..58a5572 100644
--- a/source/fsicalmanagement/authenticator.d
+++ b/source/fsicalmanagement/authenticator.d
@@ -66,7 +66,7 @@ public:
     InputRange!AuthInfo getAllUsers() @safe
     {
         import std.algorithm : map;
-        import std.range : inputRangeObject;
+        import std.range.interfaces : inputRangeObject;
 
         return users.find().map!(deserializeBson!AuthInfo).inputRangeObject;
     }
@@ -87,7 +87,7 @@ enum Privilege
 class MySQLAuthenticator : Authenticator
 {
 private:
-    import mysql : MySQLPool, Row, prepare;
+    import mysql : MySQLPool, Row, prepare, exec, query;
 
     @Autowire MySQLPool pool;
     @Autowire PasswordHasher passwordHasher;
@@ -105,7 +105,7 @@ public:
                 "SELECT id, username, passwordHash, privilege FROM "
                 ~ usersTableName ~ " WHERE username = ?");
         prepared.setArg(0, username);
-        auto result = prepared.query();
+        auto result = cn.query(prepared);
         if (!result.empty)
         {
             auto authInfo = toAuthInfo(result.front);
@@ -123,21 +123,24 @@ public:
         scope (exit)
             cn.close;
         auto prepared = cn.prepare(
-                "INSERT INTO " ~ usersTableName ~ " (username, passwordHash, privilege) VALUES(?, ?, ?)");
+                "INSERT INTO " ~ usersTableName
+                ~ " (username, passwordHash, privilege) VALUES(?, ?, ?)");
         prepared.setArgs(authInfo.username, authInfo.passwordHash, authInfo.privilege.to!uint);
-        prepared.exec();
+        cn.exec(prepared);
     }
 
     InputRange!AuthInfo getAllUsers()
     {
         import std.algorithm : map;
-        import std.range : inputRangeObject;
+        import std.array : array;
+        import std.range.interfaces : inputRangeObject;
 
         auto cn = pool.lockConnection();
         scope (exit)
             cn.close;
-        auto prepared = cn.prepare("SELECT id, username, passwordHash, privilege FROM " ~ usersTableName ~ "");
-        return prepared.querySet.map!(r => toAuthInfo(r)).inputRangeObject;
+        auto prepared = cn.prepare(
+                "SELECT id, username, passwordHash, privilege FROM " ~ usersTableName);
+        return cn.query(prepared).array.map!(r => toAuthInfo(r)).inputRangeObject;
     }
 
     void removeUser(string id)
@@ -147,7 +150,7 @@ public:
             cn.close;
         auto prepared = cn.prepare("DELETE FROM " ~ usersTableName ~ " WHERE id = ?");
         prepared.setArg(0, id.to!uint);
-        prepared.exec();
+        cn.exec(prepared);
     }
 
 private:
diff --git a/source/fsicalmanagement/event.d b/source/fsicalmanagement/event.d
index 9bd63a2..0600af9 100644
--- a/source/fsicalmanagement/event.d
+++ b/source/fsicalmanagement/event.d
@@ -70,7 +70,7 @@ private:
 class MySQLEventStore : EventStore
 {
 private:
-    import mysql : MySQLPool, prepare, Row;
+    import mysql : MySQLPool, prepare, Row, query, exec;
 
     @Value("mysql.table.events") string eventsTableName;
 
@@ -81,19 +81,22 @@ public:
         scope (exit)
             cn.close;
         auto prepared = cn.prepare(
-                "SELECT id begin end name description type shout FROM " ~ eventsTableName ~ " WHERE id = ?");
+                "SELECT id begin end name description type shout FROM "
+                ~ eventsTableName ~ " WHERE id = ?");
         prepared.setArg(0, id.to!uint);
-        return toEvent(prepared.query.front);
+        return cn.query(prepared).front.toEvent;
     }
 
     InputRange!Event getAllEvents()
     {
+        import std.array : array;
+
         auto cn = pool.lockConnection();
         scope (exit)
             cn.close;
         auto prepared = cn.prepare(
-                "SELECT id, begin, end, name, description, type, shout FROM " ~ eventsTableName ~ "");
-        return prepared.querySet.map!(r => toEvent(r)).inputRangeObject;
+                "SELECT id, begin, end, name, description, type, shout FROM " ~ eventsTableName);
+        return cn.query(prepared).array.map!(r => toEvent(r)).inputRangeObject;
     }
 
     void addEvent(Event event)
@@ -101,12 +104,11 @@ public:
         auto cn = pool.lockConnection();
         scope (exit)
             cn.close;
-        auto prepared = cn.prepare(
-                "INSERT INTO " ~ eventsTableName ~ " (begin, end, name, description, type, shout)"
-                    ~ " VALUES(?, ?, ?, ?, ?, ?)");
+        auto prepared = cn.prepare("INSERT INTO " ~ eventsTableName
+                ~ " (begin, end, name, description, type, shout)" ~ " VALUES(?, ?, ?, ?, ?, ?)");
         prepared.setArgs(event.begin, event.end, event.name, event.description,
                 event.type.to!uint, event.shout);
-        prepared.exec();
+        cn.exec(prepared);
     }
 
     /*     InputRange!Event getEventsBeginningBetween(Date begin, Date end) @safe
@@ -123,25 +125,27 @@ public:
             cn.close;
         auto prepared = cn.prepare("DELETE FROM " ~ eventsTableName ~ " WHERE id = ?");
         prepared.setArg(0, id.to!uint);
-        prepared.exec();
+        cn.exec(prepared);
     }
 
 private:
     @Autowire MySQLPool pool;
+}
 
-    Event toEvent(Row r)
-    {
-        Event event;
-        event.id = r[0].get!uint.to!string;
-        event.begin = r[1].get!Date;
-        if (r[2].hasValue)
-            event.end = r[2].get!Date;
-        event.name = r[3].get!string;
-        event.description = r[4].get!string;
-        event.type = r[5].get!uint.to!EventType;
-        event.shout = r[6].get!byte.to!bool;
-        return event;
-    }
+import mysql : Row;
+
+Event toEvent(Row r)
+{
+    Event event;
+    event.id = r[0].get!uint.to!string;
+    event.begin = r[1].get!Date;
+    if (r[2].type != typeid(typeof(null)))
+        event.end = r[2].get!Date;
+    event.name = r[3].get!string;
+    event.description = r[4].get!string;
+    event.type = r[5].get!uint.to!EventType;
+    event.shout = r[6].get!byte.to!bool;
+    return event;
 }
 
 enum EventType
@@ -155,7 +159,8 @@ enum EventType
 
 struct Event
 {
-    import std.typecons: Nullable;
+    import std.typecons : Nullable;
+
     @serializationName("_id") string id;
     @serializationName("date") Date begin;
     @serializationName("end_date") Nullable!Date end;
diff --git a/source/fsicalmanagement/fsicalmanagement.d b/source/fsicalmanagement/fsicalmanagement.d
index ec97cc5..e30ed0f 100644
--- a/source/fsicalmanagement/fsicalmanagement.d
+++ b/source/fsicalmanagement/fsicalmanagement.d
@@ -19,6 +19,7 @@ import vibe.web.web;
 @requiresAuth class FsicalManagement
 {
     import vibe.http.server : HTTPServerRequest;
+
     @noRoute AuthInfo authenticate(scope HTTPServerRequest, scope HTTPServerResponse) @safe
     {
         if (authInfo.value.isNone)
diff --git a/views/showevents.dt b/views/showevents.dt
index 59e2b5c..de8d62b 100644
--- a/views/showevents.dt
+++ b/views/showevents.dt
@@ -1,30 +1,25 @@
 extends layout.dt
 block content
 	h1 Events
-	- foreach (event; events)
-		table
+	table
+		tr
+			th begin
+			th end
+			th _id
+			th name
+			th desc
+			th etype
+			th shout
+		- foreach (event; events)
 			tr
-				td begin
 				td #{event.begin}
-			tr
-				td end
 				td #{event.end}
-			tr
-				td _id
 				td #{event.id}
-			tr
-				td name
 				td #{event.name}
-			tr
-				td desc
 				td.pre #{event.description}
-			tr
-				td etype
 				td #{event.type}
-			tr
-				td shout
 				td #{event.shout}
-		form(action="/removeevent", method="post")
-			input#id(value="#{event.id}", name="id", type="hidden")
-			input#submitButton(type="submit", value="Entfernen")
-		hr
+				td
+					form(action="/removeevent", method="post")
+						input#id(value="#{event.id}", name="id", type="hidden")
+						input#submitButton(type="submit", value="Entfernen")
diff --git a/views/showusers.dt b/views/showusers.dt
index 739d133..0f34d75 100644
--- a/views/showusers.dt
+++ b/views/showusers.dt
@@ -1,20 +1,19 @@
 extends layout.dt
 block content
 	h1 Users
-	- foreach (user; users)
-		table
+	table
+		tr
+			th id
+			th username
+			th privilege
+		- foreach (user; users)
 			tr
-				td id
 				td #{user.id}
-			tr
-				td username
 				td #{user.username}
-			tr
-				td privilege
 				td #{user.privilege}
-		form(action="/removeuser", method="post")
-			input#id(value="#{user.id}", name="id", type="hidden")
-			input#submitButton(type="submit", value="Entfernen")
-		hr
+				td
+					form(action="/removeuser", method="post")
+						input#id(value="#{user.id}", name="id", type="hidden")
+						input#submitButton(type="submit", value="Entfernen")
 	- if (_error)
 		p.error= _error