diff --git a/package.json b/package.json
index 31e2e7d..87ee9bc 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,7 @@
   },
   "dependencies": {
     "clean-css": "^4.1.11",
-    "constantinople": "^3.1.1",
+    "constantinople": "^4.0.1",
     "cookie-parser": "~1.4.4",
     "debug": "~2.6.9",
     "express": "~4.16.1",
diff --git a/yarn.lock b/yarn.lock
index 98b34f9..22d3f60 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2,6 +2,31 @@
 # yarn lockfile v1
 
 
+"@babel/helper-string-parser@^7.27.1":
+  version "7.27.1"
+  resolved "https://registry.yarnpkg.com/@babel/helper-string-parser/-/helper-string-parser-7.27.1.tgz#54da796097ab19ce67ed9f88b47bb2ec49367687"
+  integrity sha512-qMlSxKbpRlAridDExk92nSobyDdpPijUq2DW6oDnUqd0iOGxmQjyqhMIihI9+zv4LPyZdRje2cavWPbCbWm3eA==
+
+"@babel/helper-validator-identifier@^7.27.1":
+  version "7.27.1"
+  resolved "https://registry.yarnpkg.com/@babel/helper-validator-identifier/-/helper-validator-identifier-7.27.1.tgz#a7054dcc145a967dd4dc8fee845a57c1316c9df8"
+  integrity sha512-D2hP9eA+Sqx1kBZgzxZh0y1trbuU+JoDkiEwqhQ36nodYqJwyEIhPSdMNd7lOm/4io72luTPWH20Yda0xOuUow==
+
+"@babel/parser@^7.6.0":
+  version "7.27.3"
+  resolved "https://registry.yarnpkg.com/@babel/parser/-/parser-7.27.3.tgz#1b7533f0d908ad2ac545c4d05cbe2fb6dc8cfaaf"
+  integrity sha512-xyYxRj6+tLNDTWi0KCBcZ9V7yg3/lwL9DWh9Uwh/RIVlIfFidggcgxKX3GCXwCiswwcGRawBKbEg2LG/Y8eJhw==
+  dependencies:
+    "@babel/types" "^7.27.3"
+
+"@babel/types@^7.27.3", "@babel/types@^7.6.1":
+  version "7.27.3"
+  resolved "https://registry.yarnpkg.com/@babel/types/-/types-7.27.3.tgz#c0257bedf33aad6aad1f406d35c44758321eb3ec"
+  integrity sha512-Y1GkI4ktrtvmawoSq+4FCVHNryea6uR+qUQy0AGxLSsjCX0nVmkYQMBLHDkXZuo5hGx7eYdnIaslsdBFm7zbUw==
+  dependencies:
+    "@babel/helper-string-parser" "^7.27.1"
+    "@babel/helper-validator-identifier" "^7.27.1"
+
 "@types/babel-types@*", "@types/babel-types@^7.0.0":
   version "7.0.7"
   resolved "https://registry.yarnpkg.com/@types/babel-types/-/babel-types-7.0.7.tgz#667eb1640e8039436028055737d2b9986ee336e3"
@@ -155,7 +180,7 @@ commander@^2.17.1:
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.20.0.tgz#d58bb2b5c1ee8f87b0d340027e9e94e222c5a422"
   integrity sha512-7j2y+40w61zy6YC2iRNpUe/NwhNyoXrYpHMrSunaMG64nRnaf96zO/KMQR4OyN/UnE5KLyEBnKHd4aG3rskjpQ==
 
-constantinople@^3.0.1, constantinople@^3.1.1, constantinople@^3.1.2:
+constantinople@^3.0.1, constantinople@^3.1.2:
   version "3.1.2"
   resolved "https://registry.yarnpkg.com/constantinople/-/constantinople-3.1.2.tgz#d45ed724f57d3d10500017a7d3a889c1381ae647"
   integrity sha512-yePcBqEFhLOqSBtwYOGGS1exHo/s1xjekXiinh4itpNQGCu4KA1euPh1fg07N2wMITZXQkBz75Ntdt1ctGZouw==
@@ -165,6 +190,14 @@ constantinople@^3.0.1, constantinople@^3.1.1, constantinople@^3.1.2:
     babel-types "^6.26.0"
     babylon "^6.18.0"
 
+constantinople@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/constantinople/-/constantinople-4.0.1.tgz#0def113fa0e4dc8de83331a5cf79c8b325213151"
+  integrity sha512-vCrqcSIq4//Gx74TXXCGnHpulY1dskqLTFGDmhrGxzeXL8lF8kvXv6mpNWlJj1uD4DW23D4ljAqbY4RRaaUZIw==
+  dependencies:
+    "@babel/parser" "^7.6.0"
+    "@babel/types" "^7.6.1"
+
 content-disposition@0.5.2:
   version "0.5.2"
   resolved "https://registry.yarnpkg.com/content-disposition/-/content-disposition-0.5.2.tgz#0cf68bb9ddf5f2be7961c3a85178cb85dba78cb4"