diff --git a/data/helpers.d/php b/data/helpers.d/php
index 917399275..7c91d89d2 100644
--- a/data/helpers.d/php
+++ b/data/helpers.d/php
@@ -581,7 +581,7 @@ ynh_composer_exec () {
     workdir="${workdir:-$final_path}"
     phpversion="${phpversion:-$YNH_PHP_VERSION}"
 
-    COMPOSER_HOME="$workdir/.composer" \
+    COMPOSER_HOME="$workdir/.composer" COMPOSER_MEMORY_LIMIT=-1 \
         php${phpversion} "$workdir/composer.phar" $commands \
         -d "$workdir" --quiet --no-interaction
 }