diff --git a/backend/Pipfile b/backend/Pipfile
index 0c9705830..e463de3c1 100644
--- a/backend/Pipfile
+++ b/backend/Pipfile
@@ -6,7 +6,7 @@ name = "pypi"
 [packages]
 aldjemy = "~=2.2"
 altamisa = "~=0.3.0"
-attrs = "~=24.2"
+attrs = "~=25.1"
 beautifulsoup4 = "~=4.13"
 cattrs = "*"
 django = "*"  # same as django-sodar-core
diff --git a/backend/Pipfile.lock b/backend/Pipfile.lock
index a10a4eced..a79358a42 100644
--- a/backend/Pipfile.lock
+++ b/backend/Pipfile.lock
@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "112b31ad97c0e407b82da7d3030eb858501b5c7a295c4a3fb0ac156eb12cbd8a"
+            "sha256": "bc80ca6eaa3645e212903f116b7c306f246161f6377e40c6247ab35a3d3ed18b"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -236,12 +236,12 @@
         },
         "attrs": {
             "hashes": [
-                "sha256:8f5c07333d543103541ba7be0e2ce16eeee8130cb0b3f9238ab904ce1e85baff",
-                "sha256:ac96cd038792094f438ad1f6ff80837353805ac950cd2aa0e0625ef19850c308"
+                "sha256:1c97078a80c814273a76b2a298a932eb681c87415c11dee0a6921de7f1b02c3e",
+                "sha256:c75a69e28a550a7e93789579c22aa26b0f5b83b75dc4e08fe092980051e1090a"
             ],
             "index": "pypi",
             "markers": "python_version >= '3.8'",
-            "version": "==24.3.0"
+            "version": "==25.1.0"
         },
         "awesome-slugify": {
             "hashes": [