diff --git a/VERSION b/VERSION
index db77e0ee..7b4d9a4f 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.10.5
+1.10.6
diff --git a/entity-api-spec.yaml b/entity-api-spec.yaml
index 52b5ae03..dc35cbb2 100644
--- a/entity-api-spec.yaml
+++ b/entity-api-spec.yaml
@@ -1,7 +1,7 @@
 openapi: 3.0.0
 info:
   description: 'The SenNet Entity API is a standard RESTful web service with create, update and read operations for the standard SenNet provenance graph entities.'
-  version: 1.10.5
+  version: 1.10.6
   title: SenNet Entity API
   contact:
     name: SenNet Help Desk
diff --git a/src/lib/constraints/sample.py b/src/lib/constraints/sample.py
index cd2a69b3..2979bb10 100644
--- a/src/lib/constraints/sample.py
+++ b/src/lib/constraints/sample.py
@@ -18,6 +18,12 @@ def build_sample_organ_constraints(entity, constraints=None):
     descendant = build_constraint_unit(Entities.SAMPLE, [SpecimenCategories.SUSPENSION])
     constraints.append(build_constraint(ancestor, [descendant]))
 
+    # Sample suspension ---> Sample organ of blood (organ_uberon)
+    ancestor = build_constraint_unit(
+            entity, [SpecimenCategories.ORGAN], [Ontology.ops(as_data_dict=True, val_key='organ_uberon').organ_types()['BLOOD']]
+        )
+    constraints.append(build_constraint(ancestor, [descendant]))
+
     # Sample block ---> Sample organ
     ancestor = build_constraint_unit(entity, [SpecimenCategories.ORGAN])
     descendant = build_constraint_unit(Entities.SAMPLE, [SpecimenCategories.BLOCK])