diff --git a/zig-ecs/src/ecs/entity.zig b/zig-ecs/src/ecs/entity.zig
index c8f505a..2679232 100644
--- a/zig-ecs/src/ecs/entity.zig
+++ b/zig-ecs/src/ecs/entity.zig
@@ -14,9 +14,9 @@ pub fn EntityTraitsType(comptime size: EntityTraitsSize) type {
 }
 
 fn EntityTraitsDefinition(comptime EntityType: type, comptime IndexType: type, comptime VersionType: type) type {
-    std.debug.assert(@typeInfo(EntityType) == .Int and !EntityType.is_signed);
-    std.debug.assert(@typeInfo(IndexType) == .Int and !IndexType.is_signed);
-    std.debug.assert(@typeInfo(VersionType) == .Int and !VersionType.is_signed);
+    std.debug.assert(@typeInfo(EntityType) == .Int and !@typeInfo(EntityType).Int.is_signed);
+    std.debug.assert(@typeInfo(IndexType) == .Int and !@typeInfo(IndexType).Int.is_signed);
+    std.debug.assert(@typeInfo(VersionType) == .Int and !@typeInfo(VersionType).Int.is_signed);
 
     if (@bitSizeOf(IndexType) + @bitSizeOf(VersionType) != @bitSizeOf(EntityType))
         @compileError("IndexType and VersionType must sum to EntityType's bit count");
diff --git a/zig-ecs/src/ecs/groups.zig b/zig-ecs/src/ecs/groups.zig
index b5a03b9..683d1f4 100644
--- a/zig-ecs/src/ecs/groups.zig
+++ b/zig-ecs/src/ecs/groups.zig
@@ -85,7 +85,7 @@ pub const OwningGroup = struct {
 
                 var component_ptrs: [component_info.fields.len][*]u8 = undefined;
                 inline for (component_info.fields) |field, i| {
-                    const storage = group.registry.assure(field.field_type.Child);
+                    const storage = group.registry.assure(@typeInfo(field.field_type).Pointer.child);
                     component_ptrs[i] = @ptrCast([*]u8, storage.instances.items.ptr);
                 }
 
@@ -104,7 +104,7 @@ pub const OwningGroup = struct {
                 // fill and return the struct
                 var comps: Components = undefined;
                 inline for (@typeInfo(Components).Struct.fields) |field, i| {
-                    const typed_ptr = @ptrCast([*]field.field_type.Child, @alignCast(@alignOf(field.field_type.Child), it.component_ptrs[i]));
+                    const typed_ptr = @ptrCast([*]@typeInfo(field.field_type).Pointer.child, @alignCast(@alignOf(@typeInfo(field.field_type).Pointer.child), it.component_ptrs[i]));
                     @field(comps, field.name) = &typed_ptr[it.index];
                 }
                 return comps;
diff --git a/zig-ecs/src/ecs/handles.zig b/zig-ecs/src/ecs/handles.zig
index 567aeb9..d769087 100644
--- a/zig-ecs/src/ecs/handles.zig
+++ b/zig-ecs/src/ecs/handles.zig
@@ -4,9 +4,9 @@ const std = @import("std");
 /// you choose the type of the handle (aka its size) and how much of that goes to the index and the version.
 /// the bitsize of version + id must equal the handle size.
 pub fn Handles(comptime HandleType: type, comptime IndexType: type, comptime VersionType: type) type {
-    std.debug.assert(@typeInfo(HandleType) == .Int and !HandleType.is_signed);
-    std.debug.assert(@typeInfo(IndexType) == .Int and !IndexType.is_signed);
-    std.debug.assert(@typeInfo(VersionType) == .Int and !VersionType.is_signed);
+    std.debug.assert(@typeInfo(HandleType) == .Int and !@typeInfo(HandleType).Int.is_signed);
+    std.debug.assert(@typeInfo(IndexType) == .Int and !@typeInfo(IndexType).Int.is_signed);
+    std.debug.assert(@typeInfo(VersionType) == .Int and !@typeInfo(VersionType).Int.is_signed);
 
     if (@bitSizeOf(IndexType) + @bitSizeOf(VersionType) != @bitSizeOf(HandleType))
         @compileError("IndexType and VersionType must sum to HandleType's bit count");
diff --git a/zig-ecs/src/ecs/registry.zig b/zig-ecs/src/ecs/registry.zig
index b049414..9703202 100644
--- a/zig-ecs/src/ecs/registry.zig
+++ b/zig-ecs/src/ecs/registry.zig
@@ -195,7 +195,8 @@ pub const Registry = struct {
     }
 
     pub fn deinit(self: *Registry) void {
-        for (self.components.items()) |ptr| {
+        var iter = self.components.iterator();
+        while (iter.next()) |ptr| {
             // HACK: we dont know the Type here but we need to call deinit
             var storage = @intToPtr(*Storage(u1), ptr.value);
             storage.deinit();
diff --git a/zig-ecs/src/ecs/type_store.zig b/zig-ecs/src/ecs/type_store.zig
index 21db41f..a16704d 100644
--- a/zig-ecs/src/ecs/type_store.zig
+++ b/zig-ecs/src/ecs/type_store.zig
@@ -14,7 +14,8 @@ pub const TypeStore = struct {
     }
 
     pub fn deinit(self: *TypeStore) void {
-        for (self.map.items()) |kv| {
+        var iter = self.map.iterator();
+        while (iter.next()) |kv| {
             self.allocator.free(kv.value);
         }
         self.map.deinit();