diff --git a/README.md b/README.md
index f016402..2f3c21f 100644
--- a/README.md
+++ b/README.md
@@ -41,7 +41,7 @@ Verify the installation and build number of `zig` like so:
 
 ```bash
 $ zig version
-0.10.0-dev.3685+xxxxxxxxx
+0.10.0-dev.3880+xxxxxxxxx
 ```
 
 Clone this repository with Git:
@@ -81,6 +81,7 @@ about input:
 
 ### Version Changes
 
+* *2022-09-06* zig 0.10.0-dev.3880 - Ex 074 correctly fails again: comptime array len
 * *2022-08-29* zig 0.10.0-dev.3685 - @typeName() output change, stage1 req. for async
 * *2022-07-31* zig 0.10.0-dev.3385 - std lib string fmt() option changes
 * *2022-03-19* zig 0.10.0-dev.1427 - method for getting sentinel of type changed
diff --git a/build.zig b/build.zig
index 95c292b..05d2521 100644
--- a/build.zig
+++ b/build.zig
@@ -8,7 +8,7 @@ const print = std.debug.print;
 // When changing this version, be sure to also update README.md in two places:
 //     1) Getting Started
 //     2) Version Changes
-const needed_version = std.SemanticVersion.parse("0.10.0-dev.3685") catch unreachable;
+const needed_version = std.SemanticVersion.parse("0.10.0-dev.3880") catch unreachable;
 
 const Exercise = struct {
     /// main_file must have the format key_name.zig.