diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1bd16e2675..040d0e3c03 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,7 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased]
+## [0.7.4] - 2024-02-28
 ### Added
 - Subpackages for the available recommender types
 - Multi-style plotting capabilities for generated example plots
diff --git a/baybe/campaign.py b/baybe/campaign.py
index cf760fa8b5..bfcc271203 100644
--- a/baybe/campaign.py
+++ b/baybe/campaign.py
@@ -284,7 +284,7 @@ def recommend(
         # Update recommendation meta data
         if len(self._measurements_exp) > 0:
             self.n_fits_done += 1
-            self._measurements_exp["FitNr"].fillna(self.n_fits_done, inplace=True)
+            self._measurements_exp.fillna({"FitNr": self.n_fits_done}, inplace=True)
 
         # Get the recommended search space entries
         rec = self.recommender.recommend(