diff --git a/.buildlibrary b/.buildlibrary
index 05f5701..55c92f7 100644
--- a/.buildlibrary
+++ b/.buildlibrary
@@ -1,4 +1,4 @@
-ValidationKey: '3540240'
+ValidationKey: '3561771'
 AutocreateReadme: yes
 AcceptedWarnings:
 - 'Warning: package ''.*'' was built under R version'
diff --git a/CITATION.cff b/CITATION.cff
index 2480286..dc75777 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -2,8 +2,8 @@ cff-version: 1.2.0
 message: If you use this software, please cite it using the metadata from this file.
 type: software
 title: 'lpjmlkit: Toolkit for Basic LPJmL Handling'
-version: 1.7.6
-date-released: '2025-01-27'
+version: 1.7.7
+date-released: '2025-02-04'
 abstract: A collection of basic functions to facilitate the work with the Dynamic
   Global Vegetation Model (DGVM) Lund-Potsdam-Jena managed Land (LPJmL) hosted at
   the Potsdam Institute for Climate Impact Research (PIK). It provides functions for
diff --git a/DESCRIPTION b/DESCRIPTION
index ad88d5a..71b3db1 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,7 +1,7 @@
 Package: lpjmlkit
 Type: Package
 Title: Toolkit for Basic LPJmL Handling
-Version: 1.7.6
+Version: 1.7.7
 Authors@R: c(
     person("Jannes", "Breier", , "jannesbr@pik-potsdam.de", role = c("aut", "cre"), comment = c(ORCID = "0000-0002-9055-6904")),
     person("Sebastian","Ostberg", , "ostberg@pik-potsdam.de", role = "aut", comment = c(ORCID = "0000-0002-2368-7015")),
@@ -52,7 +52,8 @@ Suggests:
     raster,
     reshape2,
     maps,
-    sf
+    sf,
+    R6
 Config/testthat/edition: 3
 VignetteBuilder: knitr
-Date: 2025-01-27
+Date: 2025-02-04
diff --git a/README.md b/README.md
index 3e32640..3bc2190 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # <a href=''><img src='inst/img/logo.png' align='right' alt='logo' height=139 /></a> Toolkit for Basic LPJmL Handling
 
-R package **lpjmlkit**, version **1.7.6**
+R package **lpjmlkit**, version **1.7.7**
 
 [![CRAN status](https://www.r-pkg.org/badges/version/lpjmlkit)](https://cran.r-project.org/package=lpjmlkit) [![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.7773134.svg)](https://doi.org/10.5281/zenodo.7773134) [![R build status](https://github.com/PIK-LPJmL/lpjmlkit/workflows/check/badge.svg)](https://github.com/PIK-LPJmL/lpjmlkit/actions) [![codecov](https://codecov.io/gh/PIK-LPJmL/lpjmlkit/branch/master/graph/badge.svg)](https://app.codecov.io/gh/PIK-LPJmL/lpjmlkit) [![r-universe](https://pik-piam.r-universe.dev/badges/lpjmlkit)](https://pik-piam.r-universe.dev/builds)
 
@@ -76,7 +76,7 @@ In case of questions / problems please contact Jannes Breier <jannesbr@pik-potsd
 
 To cite package **lpjmlkit** in publications use:
 
-Breier J, Ostberg S, Wirth S, Minoli S, Stenzel F, Hötten D, Müller C (2025). "lpjmlkit: Toolkit for Basic LPJmL Handling." doi:10.5281/zenodo.7773134 <https://doi.org/10.5281/zenodo.7773134>, Version: 1.7.6, <https://github.com/PIK-LPJmL/lpjmlkit>.
+Breier J, Ostberg S, Wirth S, Minoli S, Stenzel F, Hötten D, Müller C (2025). "lpjmlkit: Toolkit for Basic LPJmL Handling." doi:10.5281/zenodo.7773134 <https://doi.org/10.5281/zenodo.7773134>, Version: 1.7.7, <https://github.com/PIK-LPJmL/lpjmlkit>.
 
 A BibTeX entry for LaTeX users is
 
@@ -85,9 +85,9 @@ A BibTeX entry for LaTeX users is
   title = {lpjmlkit: Toolkit for Basic LPJmL Handling},
   author = {Jannes Breier and Sebastian Ostberg and Stephen Björn Wirth and Sara Minoli and Fabian Stenzel and David Hötten and Christoph Müller},
   doi = {10.5281/zenodo.7773134},
-  date = {2025-01-27},
+  date = {2025-02-04},
   year = {2025},
   url = {https://github.com/PIK-LPJmL/lpjmlkit},
-  note = {Version: 1.7.6},
+  note = {Version: 1.7.7},
 }
 ```