diff --git a/cg_lims/EPPs/udf/calculate/library_normalization_revio.py b/cg_lims/EPPs/udf/calculate/library_normalization_revio.py
index a695b3a3..8958ed0f 100644
--- a/cg_lims/EPPs/udf/calculate/library_normalization_revio.py
+++ b/cg_lims/EPPs/udf/calculate/library_normalization_revio.py
@@ -4,7 +4,7 @@
 
 import click
 from cg_lims import options
-from cg_lims.exceptions import InvalidValueError, LimsError, MissingValueError
+from cg_lims.exceptions import InvalidValueError, LimsError
 from cg_lims.get.artifacts import get_artifacts
 from cg_lims.get.udfs import (
     get_artifact_concentration,