diff --git a/examples/doc-env-selection/flake.nix b/examples/doc-env-selection/flake.nix
index 1708b5e..5e8f199 100644
--- a/examples/doc-env-selection/flake.nix
+++ b/examples/doc-env-selection/flake.nix
@@ -1,6 +1,6 @@
 {
   description = "hix test project";
-  inputs.hix.url = "github:tek/hix?ref=0.6.3";
+  inputs.hix.url = "github:tek/hix?ref=0.6.4";
   outputs = {hix, ...}: hix ({config, ...}: {
     envs = {
       one.env = { number = 1; };
diff --git a/examples/doc-packages/flake.nix b/examples/doc-packages/flake.nix
index 3bab572..a2a8549 100644
--- a/examples/doc-packages/flake.nix
+++ b/examples/doc-packages/flake.nix
@@ -1,6 +1,6 @@
 {
   description = "Example";
-  inputs.hix.url = "github:tek/hix?ref=0.6.3";
+  inputs.hix.url = "github:tek/hix?ref=0.6.4";
   outputs = {hix, ...}: hix {
     packages.parser = {
       src = ./.;
diff --git a/modules/basic.nix b/modules/basic.nix
index ca84de2..ae7575a 100644
--- a/modules/basic.nix
+++ b/modules/basic.nix
@@ -273,7 +273,7 @@ in {
 
       relativePackages = util.relativePackages config.base config.internal.packagePaths;
 
-      hixVersion = "0.6.3";
+      hixVersion = "0.6.4";
 
     };
   };
diff --git a/readme.md b/readme.md
index 8b1cf96..e260419 100644
--- a/readme.md
+++ b/readme.md
@@ -19,20 +19,20 @@ To learn more, please visit the [documentation page](https://tryp.io/hix/index.h
 You can convert an existing project with Cabal files by executing this command in the project root:
 
 ```
-nix run 'github:tek/hix?ref=0.6.3#bootstrap'
+nix run 'github:tek/hix?ref=0.6.4#bootstrap'
 ```
 
 You can create a new project in the current directory:
 
 ```
-nix run 'github:tek/hix?ref=0.6.3#new' -- --name 'project-name' --author 'Your Name'
+nix run 'github:tek/hix?ref=0.6.4#new' -- --name 'project-name' --author 'Your Name'
 ```
 
 The manual process consists of first adding Hix to your Haskell project flake by specifying the input:
 
 ```nix
 {
-  inputs.hix.url = "github:tek/hix?ref=0.6.3";
+  inputs.hix.url = "github:tek/hix?ref=0.6.4";
 }
 ```
 
@@ -41,7 +41,7 @@ Then configure your project with NixOS module options:
 ```nix
 {
   description = "Example";
-  inputs.hix.url = "github:tek/hix?ref=0.6.3";
+  inputs.hix.url = "github:tek/hix?ref=0.6.4";
   outputs = {hix, ...}: hix {
     packages.parser = {
       src = ./.;