diff --git a/chronoscope/__init__.py b/chronoscope/__init__.py
index 03b2cde..94b60dc 100644
--- a/chronoscope/__init__.py
+++ b/chronoscope/__init__.py
@@ -19,7 +19,7 @@
 import errno
 import sys
 
-__version__ = '0.0.3'
+__version__ = '0.0.4'
 __author__ = 'Anatoliy Bilenko <anatoliy.bilenko@gmail.com>'
 __license__ = 'LGPLv3'
 
diff --git a/chronoscope/chart.py b/chronoscope/chart.py
index 68384cb..b67ae87 100644
--- a/chronoscope/chart.py
+++ b/chronoscope/chart.py
@@ -28,7 +28,7 @@ def plot_timeline(timeline, y_pos: int):
         event_label = current_tick["event"]
 
         pt.hlines(y_pos_scaled, start_time, end_time, lw=4,
-                  colors=cm.tab10(current) % 7)  # type: ignore[attr-defined]
+                  colors=cm.tab10(current % 7))  # type: ignore[attr-defined]
         pt.text(start_time, y_pos_scaled, event_label, rotation=90)
 
     if len(timeline[:]) == 1:
diff --git a/system-test b/system-test
index 2d7a356..50ea5dc 100755
--- a/system-test
+++ b/system-test
@@ -24,7 +24,7 @@ cmd_mkdb() {
     cd test/
     python3 -m venv ".env"
     source ".env/bin/activate"
-    pip3 install ../dist/Chronoscope-0.0.3-py3-none-any.whl
+    pip3 install ../dist/Chronoscope-0.0.4-py3-none-any.whl
     deactivate
     .env/bin/chronoscope create --trace trace.txt
     cd -