diff --git a/nixos/modules/services/networking/znc.nix b/nixos/modules/services/networking/znc.nix
index a40fd924741b..56946f37aaf9 100644
--- a/nixos/modules/services/networking/znc.nix
+++ b/nixos/modules/services/networking/znc.nix
@@ -23,7 +23,7 @@ let
   confOptions = { ... }: {
     options = {
       modules = mkOption {
-        type = types.listOf types.string;
+        type = types.listOf types.str;
         default = [ "partyline" "webadmin" "adminlog" "log" ];
         example = [ "partyline" "webadmin" "adminlog" "log" ];
         description = ''
@@ -34,7 +34,7 @@ let
       userName = mkOption {
         default = defaultUserName;
         example = "johntron";
-        type = types.string;
+        type = types.str;
         description = ''
           The user name to use when generating the `znc.conf` file.
           This is the user name used by the user logging into the ZNC web admin. 
@@ -44,7 +44,7 @@ let
       nick = mkOption {
         default = "znc-user";
         example = "john";
-        type = types.string;
+        type = types.str;
         description = ''
           The IRC nick to use when generating the `znc.conf` file.
         '';
@@ -53,7 +53,7 @@ let
       passBlock = mkOption {
         default = defaultPassBlock;
         example = "Must be the block generated by the `znc --makepass` command.";
-        type = types.string;
+        type = types.str;
         description = ''
           The pass block to use when generating the `znc.conf` file.
           This is the password used by the user logging into the ZNC web admin.
@@ -63,9 +63,9 @@ let
       };
 
       port = mkOption {
-        default = "5000";
-        example = "5000";
-        type = types.string;
+        default = 5000;
+        example = 5000;
+        type = types.int;
         description = ''
           Specifies the port on which to listen.
         '';
@@ -104,7 +104,7 @@ let
             AllowWeb = true
             IPv4 = true
             IPv6 = false
-            Port = ${if confOpts.useSSL then "+" else ""}${confOpts.port}
+            Port = ${if confOpts.useSSL then "+" else ""}${toString confOpts.port}
             SSL = ${if confOpts.useSSL then "true" else "false"}
     </Listener>
     
@@ -160,7 +160,7 @@ in
       user = mkOption {
         default = "znc";
         example = "john";
-        type = types.string;
+        type = types.str;
         description = ''
           The name of an existing user account to use to own the ZNC server process.
           If not specified, a default user will be created to own the process.
@@ -170,7 +170,7 @@ in
       dataDir = mkOption {
         default = "/home/${cfg.user}/.znc";
         example = "/home/john/.znc";
-        type = types.string; 
+        type = types.path;
         description = ''
           The data directory. Used for configuration files and modules.
         '';
@@ -179,7 +179,7 @@ in
       zncConf = mkOption {
         default = "";
         example = "See: http://wiki.znc.in/Configuration";
-        type = types.string;
+        type = types.lines;
         description = ''
           The contents of the `znc.conf` file to use when creating it.
           If specified, `confOptions` will be ignored, and this value, as-is, will be used.
@@ -218,9 +218,9 @@ in
       };
  
       extraFlags = mkOption {
-        default = "";
-        example = "--debug";
-        type = types.string;
+        default = [ ];
+        example = [ "--debug" ];
+        type = types.listOf types.str;
         description = ''
           Extra flags to use when executing znc command.
         '';
@@ -272,7 +272,7 @@ in
           ${pkgs.znc}/bin/znc --makepem
         fi
       '';
-      script = "${pkgs.znc}/bin/znc --foreground --datadir ${cfg.dataDir} ${cfg.extraFlags}";
+      script = "${pkgs.znc}/bin/znc --foreground --datadir ${cfg.dataDir} ${toString cfg.extraFlags}";
     };
 
     users.extraUsers = optional (cfg.user == defaultUser)