diff --git a/CMakeLists.txt b/CMakeLists.txt
index 919f7b5fa0329edc62259bba6a5f4969f27da6fe..8c2a340c2c765ed7e836fea0d82dda78b34e043e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -38,7 +38,7 @@ project(zig
 )
 
 set(ZIG_VERSION_MAJOR 0)
-set(ZIG_VERSION_MINOR 17)
+set(ZIG_VERSION_MINOR 18)
 set(ZIG_VERSION_PATCH 0)
 set(ZIG_VERSION "" CACHE STRING "Override Zig version string. Default is to find out with git.")
 
diff --git a/bootstrap.c b/bootstrap.c
index b4f685416045099458a3ecef86560000f6b8dac9..f0cdc8e0a2e2cb418ea0029cbb0a4aaae6c258be 100644
--- a/bootstrap.c
+++ b/bootstrap.c
@@ -168,7 +168,7 @@ int main(int argc, char **argv) {
         if (f == NULL)
             panic("unable to open config.zig for writing");
 
-        const char *zig_version = "0.17.0.bootstrap";
+        const char *zig_version = "0.18.0-dev.bootstrap";
 
         int written = fprintf(f,
             "pub const have_llvm = false;\n"
diff --git a/build.zig b/build.zig
index aad5a316a9ab7036a4a283582253eb36dfa055c0..b3b48933d6472dc9d70f1be473e12ef14e3ed212 100644
--- a/build.zig
+++ b/build.zig
@@ -9,7 +9,7 @@ const Io = std.Io;
 const tests = @import("test/tests.zig");
 const DevEnv = @import("src/dev.zig").Env;
 
-const zig_version: std.SemanticVersion = .{ .major = 0, .minor = 17, .patch = 0 };
+const zig_version: std.SemanticVersion = .{ .major = 0, .minor = 18, .patch = 0 };
 const stack_size = 46 * 1024 * 1024;
 
 const IoMode = enum { threaded, evented };