diff --git a/ontology/saref4ehaw.ttl b/ontology/saref4ehaw.ttl
index dca08a77b6a6d53d9856bc1f593dff84288bde05..713f0aba0df8dd2033d3ff13c0e976e48e2af946 100644
--- a/ontology/saref4ehaw.ttl
+++ b/ontology/saref4ehaw.ttl
@@ -631,7 +631,7 @@ s4ehaw:hasResult rdf:type owl:DatatypeProperty ;
 ###  https://saref.etsi.org/saref4ehaw/hasValues
 s4ehaw:hasValues rdf:type owl:DatatypeProperty ;
                  rdfs:domain s4ehaw:TimeSeriesMeasurement ;
-                 rdfs:range xsd:double ;
+                 rdfs:range xsd:decimal ;
                  rdfs:comment "A relationship defining the set of values (an ordered array of numbers) of a certain property, e.g., heart rate. Attention: to assure ordering in the serialization format, it is necessary to use either rdf:Seq (RDF/XML) or @list (JSON-LD)."@en ;
 		 rdfs:label "has values"@en .
 
@@ -1186,7 +1186,7 @@ s4ehaw:TimeSeriesMeasurement rdf:type owl:Class ;
                                               ] ,
                                               [ rdf:type owl:Restriction ;
                                                 owl:onProperty s4ehaw:hasValues ;
-                                                owl:allValuesFrom xsd:double
+                                                owl:allValuesFrom xsd:decimal
                                               ] ;
                               rdfs:comment "A sequence of data in a successive equally spaced points in time. The O&M ontology (ISO 19156) defines Time Series Observation  as an “observation whose result is a time-series”, while both Hl7 aECG and DICOM standards define the Series element as a sequence of data sharing a common frame of reference. In SAREF4health this concept is termed as Time Series Measurements since this sequence of data refers to time series measured by a health device." ;
                               rdfs:label "Time series measurement" .