diff --git a/adit-client/pyproject.toml b/adit-client/pyproject.toml
index f5b961d9..c6360a4a 100644
--- a/adit-client/pyproject.toml
+++ b/adit-client/pyproject.toml
@@ -3,7 +3,7 @@ name = "adit-client"
 version = "0.1.0"
 description = "ADIT Client library to connect to an ADIT server."
 authors = ["Kai Schlamp <kai.schlamp@gmail.com>"]
-license = "GPLv3"
+license = "GPL-3.0-or-later"
 readme = "README.md"
 packages = [{ include = "adit-client" }]
 
diff --git a/package.json b/package.json
index 5c455b3e..027bf800 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,7 @@
     "url": "git+https://github.com/medihack/adit.git"
   },
   "author": "kai.schlamp@gmail.com",
-  "license": "GPLv3",
+  "license": "GPL-3.0-or-later",
   "bugs": {
     "url": "https://github.com/medihack/adit/issues"
   },
diff --git a/pyproject.toml b/pyproject.toml
index 8dbe026f..d5327517 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -3,7 +3,7 @@ name = "adit"
 version = "0.26.0"
 description = "ADIT (Automated DICOM Transfer) is a swiss army knife to exchange DICOM data between various systems by using a convenient web frontend."
 authors = ["medihack <kai.schlamp@gmail.com>"]
-license = "GPLv3"
+license = "GPL-3.0-or-later"
 
 [tool.poetry.dependencies]
 adrf = "^0.1.1"