diff --git a/README.md b/README.md
index df09ac82..84e03cb5 100644
--- a/README.md
+++ b/README.md
@@ -307,6 +307,16 @@ These tools can be set up globally using the `tools` input. It accepts a string
 - If you do not want to use all your dev-dependencies in workflow, you can run composer with `--no-dev` and install required tools using `tools` input to speed up your workflow.
 - By default, `COMPOSER_NO_INTERACTION` is set to `1` and `COMPOSER_PROCESS_TIMEOUT` is set to `0`. In effect, this means that Composer commands in your scripts do not need to specify `--no-interaction`.
 - Also, `COMPOSER_NO_AUDIT` is set to `1`. So if you want to audit your dependencies for security vulnerabilities, it is recommended to add a `composer audit` step before you install them.
+- If you want to set a different `COMPOSER_PROCESS_TIMEOUT`, you can set it in your workflow file using the `env` keyword.
+
+```yaml
+- name: Setup PHP with composer and custom process timeout
+  uses: shivammathur/setup-php@v2
+  with:
+    php-version: '8.3'
+  env:
+    COMPOSER_PROCESS_TIMEOUT: 300
+```
 
 ## :signal_strength: Coverage Support
 
diff --git a/src/scripts/tools/add_tools.ps1 b/src/scripts/tools/add_tools.ps1
index b117d349..d817bc0c 100644
--- a/src/scripts/tools/add_tools.ps1
+++ b/src/scripts/tools/add_tools.ps1
@@ -23,7 +23,7 @@ Function Edit-ComposerConfig() {
   if (-not(Test-Path $composer_json)) {
     Set-Content -Path $composer_json -Value "{}"
   }
-  Add-EnvPATH $src\configs\composer.env
+  Set-ComposerEnv
   Add-Path $composer_bin
   Set-ComposerAuth
 }
@@ -52,6 +52,14 @@ Function Set-ComposerAuth() {
   }
 }
 
+# Function to set composer environment variables.
+Function Set-ComposerEnv() {
+  if ($env:COMPOSER_PROCESS_TIMEOUT) {
+    (Get-Content $src\configs\composer.env -Raw) -replace '(?m)^COMPOSER_PROCESS_TIMEOUT=.*$', "COMPOSER_PROCESS_TIMEOUT=$env:COMPOSER_PROCESS_TIMEOUT" | Set-Content $src\configs\composer.env
+  }
+  Add-EnvPATH $src\configs\composer.env
+}
+
 # Function to extract tool version.
 Function Get-ToolVersion() {
   Param (
diff --git a/src/scripts/tools/add_tools.sh b/src/scripts/tools/add_tools.sh
index 0ffbba51..d58ca61f 100644
--- a/src/scripts/tools/add_tools.sh
+++ b/src/scripts/tools/add_tools.sh
@@ -42,7 +42,7 @@ configure_composer() {
     echo '{}' | tee "$composer_json" >/dev/null
     chmod 644 "$composer_json"
   fi
-  add_env_path "${src:?}"/configs/composer.env
+  set_composer_env
   add_path "$composer_bin"
   set_composer_auth
 }
@@ -68,6 +68,16 @@ set_composer_auth() {
   fi
 }
 
+# Function to set composer environment variables.
+set_composer_env() {
+  composer_env="${src:?}"/configs/composer.env
+  if [ -n "$COMPOSER_PROCESS_TIMEOUT" ]; then
+    sed_arg="s/COMPOSER_PROCESS_TIMEOUT.*/COMPOSER_PROCESS_TIMEOUT=$COMPOSER_PROCESS_TIMEOUT/"
+    sed -i "$sed_arg" "$composer_env" 2>/dev/null || sed -i '' "$sed_arg" "$composer_env"
+  fi
+  add_env_path "$composer_env"
+}
+
 # Helper function to configure tools.
 add_tools_helper() {
   tool=$1