diff --git a/codemeta.json b/codemeta.json
index 22a37d62d4ef61f10a3e3ca56e2d798d40739c65..aa6f4e6b38767722c3c3c188d2eac74fbd13e647 100644
--- a/codemeta.json
+++ b/codemeta.json
@@ -6,17 +6,19 @@
     "contIntegration": "https://git.km3net.de/km3py/km3io/-/pipelines",
     "dateCreated": "2019-11-15",
     "datePublished": "2019-11-15",
-    "dateModified": "2022-09-23",
+    "dateModified": "2023-06-15",
     "downloadUrl": "https://git.km3net.de/km3py/km3io",
     "issueTracker": "https://git.km3net.de/km3py/km3io/-/issues",
     "name": "km3io",
-    "softwareVersion": "0.27.0",
+    "softwareVersion": "1.0.0",
     "maintainer": "Tamas Gal <tamas.gal@fau.de>",
     "readme": "https://git.km3net.de/km3py/km3io/-/blob/master/README.rst",
     "description": "Pure Python I/O library for KM3NeT related files.",
     "applicationCategory": "Astroparticle physics",
     "developmentStatus": "active",
     "referencePublication": "https://doi.org/10.5281/zenodo.808829",
+    "releaseNotes": "https://km3py.pages.km3net.de/km3io/changelog.html",
+    "copyrightHolder": "KM3NeT Collaboration",
     "keywords": [
         "i/o",
         "astroparticle physics",