diff --git a/StandardizedClinicalDataTables/SPECIMEN.md b/StandardizedClinicalDataTables/SPECIMEN.md
index 164f8c9..95ef507 100644
--- a/StandardizedClinicalDataTables/SPECIMEN.md
+++ b/StandardizedClinicalDataTables/SPECIMEN.md
@@ -1,7 +1,7 @@
 The specimen domain contains the records identifying biological samples from a person.
  
 Field|Required|Type|Description
-:-------------------------|:--------|:------------|:------------------------------------------------------
+:-----------------------------|:--------|:------------|:------------------------------------------------------
 |specimen_id|Yes|integer|A unique identifier for each specimen.|
 |person_id|Yes|integer|A foreign key identifier to the Person for whom the Specimen is recorded.|
 |specimen_concept_id|Yes|integer|A foreign key referring to a Standard Concept identifier in the Standardized Vocabularies for the Specimen.|