diff --git a/src/custom.zig b/src/custom.zig
index 0420bd3..e1a9107 100644
--- a/src/custom.zig
+++ b/src/custom.zig
@@ -16,7 +16,7 @@ pub const RandomNoise = struct {
 
     pub fn init(
         allocator: *std.mem.Allocator,
-        params: var,
+        params: anytype,
     ) ?RandomNoise {
         var r = std.rand.DefaultPrng.init(params.seed);
 
@@ -64,7 +64,7 @@ pub const WildNoise = struct {
 
     pub fn init(
         allocator: *std.mem.Allocator,
-        params: var,
+        params: anytype,
     ) ?WildNoise {
         var r = std.rand.DefaultPrng.init(params.seed);
 
@@ -112,7 +112,7 @@ pub const Write = struct {
 
     pub fn init(
         allocator: *std.mem.Allocator,
-        params: var,
+        params: anytype,
     ) Write {
         return Write{
             .data = params.data,
@@ -133,7 +133,7 @@ pub const Embed = struct {
     sndfile: *c.SNDFILE = undefined,
     buf: []f32 = undefined,
 
-    pub fn init(allocator: *std.mem.Allocator, params: var) @This() {
+    pub fn init(allocator: *std.mem.Allocator, params: anytype) @This() {
         return Embed{
             .allocator = allocator,
             .filepath = params.path,
diff --git a/src/image.zig b/src/image.zig
index e0fea67..0501e70 100644
--- a/src/image.zig
+++ b/src/image.zig
@@ -425,7 +425,7 @@ pub const Image = struct {
         self: *Image,
         comptime Plugin: type,
         position: plugins.Position,
-        extra: var,
+        extra: anytype,
     ) !void {
         var plugin_opt: ?Plugin = Plugin.init(self.allocator, extra);
         if (plugin_opt == null) {
diff --git a/src/lang.zig b/src/lang.zig
index 305eb4a..134307b 100644
--- a/src/lang.zig
+++ b/src/lang.zig
@@ -497,7 +497,7 @@ pub const Lang = struct {
         self.has_error = false;
         self.line = 0;
     }
-    fn doError(self: *Lang, comptime fmt: []const u8, args: var) void {
+    fn doError(self: *Lang, comptime fmt: []const u8, args: anytype) void {
         std.debug.warn("ERROR! at line {}: ", .{self.line});
         std.debug.warn(fmt, args);
         std.debug.warn("\n", .{});
diff --git a/src/main.zig b/src/main.zig
index be1b672..a53c1fb 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -36,7 +36,7 @@ fn copyCommandToHeap(allocator: *std.mem.Allocator, command: langs.Command, comp
     return &heap_cmd.base;
 }
 
-pub fn doRepl(allocator: *std.mem.Allocator, args_it: var) !void {
+pub fn doRepl(allocator: *std.mem.Allocator, args_it: anytype) !void {
     var stdout_file = std.io.getStdOut();
     const stdout = &stdout_file.outStream();
     const scri_path = try (args_it.next(allocator) orelse @panic("expected scri path"));
diff --git a/src/printer.zig b/src/printer.zig
index bf32f76..d0b8f2f 100644
--- a/src/printer.zig
+++ b/src/printer.zig
@@ -1,7 +1,7 @@
 const std = @import("std");
 const langs = @import("lang.zig");
 
-fn printCommandWithParams(stream: var, command: var) !void {
+fn printCommandWithParams(stream: anytype, command: anytype) !void {
     const Parameters = @TypeOf(command.parameters);
     try stream.print(" {} {}", .{ command.split, command.index });
     inline for (@typeInfo(Parameters).Struct.fields) |field| {
@@ -13,7 +13,7 @@ fn printCommandWithParams(stream: var, command: var) !void {
     }
 }
 
-fn printCommand(stream: var, cmd: *langs.Command, comptime tag: langs.Command.Tag) !void {
+fn printCommand(stream: anytype, cmd: *langs.Command, comptime tag: langs.Command.Tag) !void {
     const CommandStruct = langs.Command.tagToType(tag);
     const casted = cmd.cast(CommandStruct).?;
 
@@ -31,7 +31,7 @@ fn printCommand(stream: var, cmd: *langs.Command, comptime tag: langs.Command.Ta
     }
 }
 
-pub fn printList(list: langs.CommandList, stream: var) !void {
+pub fn printList(list: langs.CommandList, stream: anytype) !void {
     for (list.items) |cmd| {
         const command = @tagName(cmd.tag);
         try stream.print("{}", .{command});
diff --git a/src/runner.zig b/src/runner.zig
index a089a67..acffe2a 100644
--- a/src/runner.zig
+++ b/src/runner.zig
@@ -209,7 +209,7 @@ pub const Runner = struct {
         try magick.runRotate(image, rotate_cmd.deg, c_bgfill);
     }
 
-    fn executeLV2Command(self: *@This(), command: var) !void {
+    fn executeLV2Command(self: *@This(), command: anytype) !void {
         const pos = plugin.Position{
             .split = command.split,
             .index = command.index,
@@ -231,7 +231,7 @@ pub const Runner = struct {
         try image.runPlugin(typ.lv2_url, pos, params);
     }
 
-    fn executeCustomCommand(self: *@This(), command: var) !void {
+    fn executeCustomCommand(self: *@This(), command: anytype) !void {
         const pos = plugin.Position{
             .split = command.split,
             .index = command.index,