diff --git a/src/features/utils/resample_episodes.R b/src/features/utils/resample_episodes.R
index eac57f05..a32fd97e 100644
--- a/src/features/utils/resample_episodes.R
+++ b/src/features/utils/resample_episodes.R
@@ -1,4 +1,5 @@
 source("renv/activate.R")
+library("tibble")
 library("dplyr")
 library("tidyr")
 library("tibble")
diff --git a/src/features/utils/utils.py b/src/features/utils/utils.py
index d2060aee..79c08455 100644
--- a/src/features/utils/utils.py
+++ b/src/features/utils/utils.py
@@ -35,7 +35,7 @@ def chunk_episodes(sensor_episodes):
     sensor_episodes = sensor_episodes.copy()
 
     # Unix timestamp for current segment in milliseconds
-    sensor_episodes[["segment_start_timestamp", "segment_end_timestamp"]] = sensor_episodes["timestamps_segment"].str.split(",", expand=True)
+    sensor_episodes[["segment_start_timestamp", "segment_end_timestamp"]] = sensor_episodes["timestamps_segment"].str.split(",", expand=True).astype(int)
 
     # Compute chunked timestamp
     sensor_episodes["chunked_start_timestamp"] = sensor_episodes[["start_timestamp", "segment_start_timestamp"]].max(axis=1)