diff --git a/src/client.vala b/src/client.vala
index f2aa0e4..6646f20 100644
--- a/src/client.vala
+++ b/src/client.vala
@@ -51,8 +51,9 @@ private void print_help (string[] args) {
 }
 
 private void on_subscribe (uint count, bool dnd, bool cc_open) {
-    stdout.write (
-        @"{ \"count\": $(count), \"dnd\": $(dnd), \"visible\": $(cc_open) }\n".data);
+    stdout.printf (
+        "{ \"count\": %u, \"dnd\": %s, \"visible\": %s }\n"
+         .printf (count, dnd.to_string (), cc_open.to_string ()));
 }
 
 private void print_subscribe () {
@@ -70,12 +71,12 @@ private void on_subscribe_waybar (uint count, bool dnd, bool cc_open) {
 
     string tooltip = "";
     if (count > 0) {
-        tooltip = @"$(count) Notification" + (count > 1 ? "s" : "");
+        tooltip = "%u Notification%s".printf (count, count > 1 ? "s" : "");
     }
 
-    string _class = @"\"$(state)\"";
+    string _class = "\"%s\"".printf (state);
     if (cc_open) {
-        _class = @"[$(_class), \"cc-open\"]";
+        _class = "[%s, \"cc-open\"]".printf (_class);
     }
 
     print (
diff --git a/src/configModel/configModel.vala b/src/configModel/configModel.vala
index d33bb16..5fa0f42 100644
--- a/src/configModel/configModel.vala
+++ b/src/configModel/configModel.vala
@@ -48,8 +48,8 @@ namespace SwayNotificationCenter {
 
         public string to_string () {
             string[] fields = {};
-            if (sound != null) fields += @"sound: $sound";
-            if (icon != null) fields += @"icon: $icon";
+            if (sound != null) fields += "sound: %s".printf (sound);
+            if (icon != null) fields += "icon: %s".printf (icon);
             return string.joinv (", ", fields);
         }
     }
@@ -106,11 +106,11 @@ namespace SwayNotificationCenter {
 
         public string to_string () {
             string[] fields = {};
-            if (app_name != null) fields += @"app-name: $app_name";
-            if (summary != null) fields += @"summary: $summary";
-            if (body != null) fields += @"body: $body";
-            if (urgency != null) fields += @"urgency: $urgency";
-            if (category != null) fields += @"category: $category";
+            if (app_name != null) fields += "app-name: %s".printf (app_name);
+            if (summary != null) fields += "summary: %s".printf (summary);
+            if (body != null) fields += "body: %s".printf (body);
+            if (urgency != null) fields += "urgency: %s".printf (urgency);
+            if (category != null) fields += "category: %s".printf (category);
             return string.joinv (", ", fields);
         }
 
@@ -175,15 +175,15 @@ namespace SwayNotificationCenter {
             try {
                 string[] spawn_env = Environ.get ();
                 // Export env variables
-                spawn_env += @"SWAYNC_APP_NAME=" + param.app_name;
-                spawn_env += @"SWAYNC_SUMMARY=" + param.summary;
-                spawn_env += @"SWAYNC_BODY=" + param.body;
-                spawn_env += @"SWAYNC_URGENCY=" + param.urgency.to_string ();
-                spawn_env += @"SWAYNC_CATEGORY=" + param.category;
-                spawn_env += @"SWAYNC_ID=" + param.applied_id.to_string ();
-                spawn_env += @"SWAYNC_REPLACES_ID=" + param.replaces_id.to_string ();
-                spawn_env += @"SWAYNC_TIME=" + param.time.to_string ();
-                spawn_env += @"SWAYNC_DESKTOP_ENTRY=" + param.desktop_entry ?? "";
+                spawn_env += "SWAYNC_APP_NAME=%s".printf (param.app_name);
+                spawn_env += "SWAYNC_SUMMARY=%s".printf (param.summary);
+                spawn_env += "SWAYNC_BODY=%s".printf (param.body);
+                spawn_env += "SWAYNC_URGENCY=%s".printf (param.urgency.to_string ());
+                spawn_env += "SWAYNC_CATEGORY=%s".printf (param.category);
+                spawn_env += "SWAYNC_ID=%s".printf (param.applied_id.to_string ());
+                spawn_env += "SWAYNC_REPLACES_ID=%s".printf (param.replaces_id.to_string ());
+                spawn_env += "SWAYNC_TIME=%s".printf (param.time.to_string ());
+                spawn_env += "SWAYNC_DESKTOP_ENTRY=%s".printf (param.desktop_entry ?? "");
 
                 Pid child_pid;
                 Process.spawn_async (
diff --git a/src/notiDaemon/notiDaemon.vala b/src/notiDaemon/notiDaemon.vala
index 494f71b..8438109 100644
--- a/src/notiDaemon/notiDaemon.vala
+++ b/src/notiDaemon/notiDaemon.vala
@@ -129,13 +129,13 @@ namespace SwayNotificationCenter {
          */
         [DBus (name = "Notify")]
         public new uint32 notify (string app_name,
-                              uint32 replaces_id,
-                              string app_icon,
-                              string summary,
-                              string body,
-                              string[] actions,
-                              HashTable<string, Variant> hints,
-                              int expire_timeout) throws DBusError, IOError {
+                                  uint32 replaces_id,
+                                  string app_icon,
+                                  string summary,
+                                  string body,
+                                  string[] actions,
+                                  HashTable<string, Variant> hints,
+                                  int expire_timeout) throws DBusError, IOError {
             uint32 id = replaces_id;
             if (replaces_id == 0 || replaces_id > noti_id) id = ++noti_id;
 
@@ -227,7 +227,7 @@ namespace SwayNotificationCenter {
                             _hints.insert ("urgency",
                                            UrgencyLevels.CRITICAL.to_byte ());
 
-                            string _summary = @"Failed to run script: $key";
+                            string _summary = "Failed to run script: %s".printf (key);
                             string _body = "<b>Output:</b> " + error_msg;
                             this.notify ("SwayNotificationCenter",
                                          0,
@@ -274,9 +274,9 @@ namespace SwayNotificationCenter {
          */
         [DBus (name = "GetServerInformation")]
         public void get_server_information (out string name,
-                                          out string vendor,
-                                          out string version,
-                                          out string spec_version)
+                                            out string vendor,
+                                            out string version,
+                                            out string spec_version)
         throws DBusError, IOError {
             name = "SwayNotificationCenter";
             vendor = "ErikReider";
diff --git a/src/notiModel/notiModel.vala b/src/notiModel/notiModel.vala
index b4384ab..99a04ab 100644
--- a/src/notiModel/notiModel.vala
+++ b/src/notiModel/notiModel.vala
@@ -59,7 +59,7 @@ namespace SwayNotificationCenter {
 
         public string to_string () {
             if (identifier == null || name == null) return "None";
-            return @"Name: $name, Id: $identifier";
+            return "Name: %s, Id: %s".printf (name, identifier);
         }
     }
 
@@ -250,7 +250,7 @@ namespace SwayNotificationCenter {
                 if (!key.contains ("image") && !key.contains ("icon")) {
                     data = v.print (true);
                 }
-                _hints += @"\n\t$key: " + data;
+                _hints += "\n\t%s: %s".printf (key, data);
             }
             params.set ("hints", string.joinv ("", _hints));
             params.set ("expire_timeout", expire_timeout.to_string ());
@@ -273,7 +273,7 @@ namespace SwayNotificationCenter {
             string[] result = {};
             foreach (var k in params.get_keys ()) {
                 string ? v = params[k];
-                result += @"$k:\t\t" + v;
+                result += "%s:\t\t %s".printf (k, v);
             }
             return "\n" + string.joinv ("\n", result);
         }