diff --git a/src/main/resources/mappers/estimate/estimateMapper.xml b/src/main/resources/mappers/estimate/estimateMapper.xml
index c41cc87c..005ce9f1 100644
--- a/src/main/resources/mappers/estimate/estimateMapper.xml
+++ b/src/main/resources/mappers/estimate/estimateMapper.xml
@@ -489,7 +489,7 @@
                                 WHEN X.PC_VOL_KW <= (X.M_VOL_KW + X.M_VOL_KW2) THEN X.PC_VOL_KW
                                 ELSE 0
                                 END
-                    ) AS DECIMAL(18,2)
+                    ) AS DECIMAL(18,3)
             ) AS CERT_VOL_KW
         FROM
             X;