diff --git a/.circleci/config.yml b/.circleci/config.yml
index 954ece0..4c2b345 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -28,7 +28,7 @@ jobs:
           name: composer
           command: |
             if [[ ! -f vendor/autoload.php ]]; then
-                curl https://getcomposer.org/composer-stable.phar --location --silent  --output /usr/bin/composer; \
+                curl https://getcomposer.org/composer-1.phar --location --silent  --output /usr/bin/composer; \
                 chmod +x /usr/bin/composer; \
                 composer install --no-progress --no-interaction; \
             fi
@@ -85,7 +85,7 @@ jobs:
           name: composer
           command: |
             if [[ ! -f vendor/autoload.php ]]; then
-                curl https://getcomposer.org/composer-stable.phar --location --silent  --output /usr/bin/composer; \
+                curl https://getcomposer.org/composer-1.phar --location --silent  --output /usr/bin/composer; \
                 chmod +x /usr/bin/composer; \
                 composer install --no-progress --no-interaction; \
             fi
diff --git a/changelog.MD b/changelog.MD
index eed0900..434cbd5 100644
--- a/changelog.MD
+++ b/changelog.MD
@@ -1,5 +1,12 @@
 # Changelog
 
+## 1.2.1
+
+**Miscellaneous**
+* Fix CI: utilization of the library with PHP 7.2 and 7.3 requires composer 1.x while an utilization with PHP 7.4
+can work with Composer 2. This requirement comes from the _ocramius/package-versions_ package, a dependency of
+_infection/infection_. This limitation should be removed in the next release with dropping the support of < PHP 7.4.
+
 ## 1.2
 
 **New features**