diff --git a/Jenkinsfile b/Jenkinsfile
index 47f58808..d873dd84 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -18,7 +18,8 @@ pipeline {
 				}
 			}
 			steps {
-				sh 'apk add --no-cache git'
+				sh 'apk add --no-cache git icu-dev'
+				sh 'docker-php-ext-configure intl && docker-php-ext-install intl'
 				sh 'php ./vendor/bin/phpunit --colors=never'
 			}
 		}
@@ -30,7 +31,8 @@ pipeline {
 				}
 			}
 			steps {
-				sh 'apk add --no-cache git'
+				sh 'apk add --no-cache git icu-dev'
+				sh 'docker-php-ext-configure intl && docker-php-ext-install intl'
 				sh 'php ./vendor/bin/phpunit --colors=never'
 			}
 		}
diff --git a/composer.json b/composer.json
index cf9027f9..b6511b1b 100644
--- a/composer.json
+++ b/composer.json
@@ -43,7 +43,7 @@
 	"aviat/query": "^3.0.0",
 	"danielstjules/stringy": "^3.1.0",
 	"ext-dom": "*",
-	"ext-iconv": "*",
+	"ext-intl": "*",
 	"ext-json": "*",
 	"ext-gd": "*",
 	"ext-pdo": "*",
@@ -57,7 +57,8 @@
 	"psr/http-message": "^1.0.1",
 	"psr/log": "^1.1.3",
 	"robmorgan/phinx": "^0.12.4",
-	"symfony/polyfill-intl-icu": "^1.0.0",
+	"symfony/polyfill-mbstring": "^1.0.0",
+	"symfony/polyfill-util": "^1.0.0",
 	"symfony/var-dumper": "^5.0.7",
 	"yosymfony/toml": "^1.0.4"
   },