diff --git a/.github/workflows/bc.yml b/.github/workflows/bc.yml
index 3276dd0..a075528 100644
--- a/.github/workflows/bc.yml
+++ b/.github/workflows/bc.yml
@@ -25,3 +25,4 @@ jobs:
         ['ubuntu-latest']
       php: >-
         ['8.4']
+      extensions: pdo_oci
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index aeee325..fe1e02c 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -28,7 +28,7 @@ jobs:
 
     env:
       COMPOSER_ROOT_VERSION: 1.0.0
-      EXTENSIONS: pdo, pdo_oci
+      EXTENSIONS: pdo_oci
 
     runs-on: ubuntu-latest
 
diff --git a/.github/workflows/composer-require-checker.yml b/.github/workflows/composer-require-checker.yml
index 2f8aece..4879a7b 100644
--- a/.github/workflows/composer-require-checker.yml
+++ b/.github/workflows/composer-require-checker.yml
@@ -26,5 +26,6 @@ jobs:
     with:
       php: >-
         ['8.1', '8.2', '8.3', '8.4', '8.5']
+      extensions: pdo_oci
       required-packages: >-
         ['db']
diff --git a/.github/workflows/mutation.yml b/.github/workflows/mutation.yml
index c56c355..cd3788b 100644
--- a/.github/workflows/mutation.yml
+++ b/.github/workflows/mutation.yml
@@ -24,7 +24,7 @@ jobs:
 
     env:
       COMPOSER_ROOT_VERSION: 1.0.0
-      EXTENSIONS: pdo, pdo_oci
+      EXTENSIONS: pdo_oci
 
     runs-on: ${{ matrix.os }}
 
diff --git a/.github/workflows/rector-cs.yml b/.github/workflows/rector-cs.yml
index 3982a9c..9efcefc 100644
--- a/.github/workflows/rector-cs.yml
+++ b/.github/workflows/rector-cs.yml
@@ -25,5 +25,6 @@ jobs:
     with:
       repository: ${{ github.event.pull_request.head.repo.full_name }}
       php: '8.1'
+      extensions: pdo_oci
       required-packages: >-
         ['db']
diff --git a/.github/workflows/static.yml b/.github/workflows/static.yml
index 287f4ac..f0f4e65 100644
--- a/.github/workflows/static.yml
+++ b/.github/workflows/static.yml
@@ -26,5 +26,6 @@ jobs:
     with:
       php: >-
         ['8.1', '8.2', '8.3', '8.4']
+      extensions: pdo_oci
       required-packages: >-
         ['db']
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8d24864..44db10d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,7 @@
 
 - Enh #392: Explicitly import classes and functions in "use" section (@mspirkov)
 - Enh #393: Remove unnecessary files from Composer package (@mspirkov)
+- Enh #394: Add `ext-pdo_oci` to `require` section of `composer.json` (@Tigrov)
 
 ## 2.0.0 December 05, 2025
 
diff --git a/README.md b/README.md
index e8d484c..45ad767 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,7 @@ Driver supports Oracle 12c - 21c.
 ## Requirements
 
 - PHP 8.1 - 8.5.
-- `pdo` PHP extension.
+- `pdo_oci` PHP extension.
 
 ## Installation
 
diff --git a/composer.json b/composer.json
index 442f57d..510ac3c 100644
--- a/composer.json
+++ b/composer.json
@@ -31,6 +31,7 @@
     ],
     "require": {
         "ext-pdo": "*",
+        "ext-pdo_oci": "*",
         "php": "8.1 - 8.5",
         "yiisoft/db": "^2.0"
     },