diff --git a/CHANGELOG.md b/CHANGELOG.md
index 77511df..b298fff 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 None.
 
+## [1.0.4] - 2023-04-06
+
+### Fixed
+
+- Properties can be prefixed when serialized.
+
 ## [1.0.3] - 2023-02-20
 
 ### Fixed
@@ -49,6 +55,7 @@ None.
 - Gemspec file.
 
 [unreleased]: https://github.com/assemblee-virtuelle/semantizer-ruby/compare/v1.0.0...HEAD
+[1.0.4]: https://github.com/assemblee-virtuelle/semantizer-ruby/compare/v1.0.3...v1.0.4
 [1.0.3]: https://github.com/assemblee-virtuelle/semantizer-ruby/compare/v1.0.2...v1.0.3
 [1.0.2]: https://github.com/assemblee-virtuelle/semantizer-ruby/compare/v1.0.1...v1.0.2
 [1.0.1]: https://github.com/assemblee-virtuelle/semantizer-ruby/compare/v1.0.0...v1.0.1
diff --git a/lib/virtual_assembly/semantizer/hash_serializer.rb b/lib/virtual_assembly/semantizer/hash_serializer.rb
index fb181b6..144e072 100644
--- a/lib/virtual_assembly/semantizer/hash_serializer.rb
+++ b/lib/virtual_assembly/semantizer/hash_serializer.rb
@@ -25,6 +25,11 @@
 # {"http://xmlns.com/foaf/0.1/name" => "John"}.
 class VirtualAssembly::Semantizer::HashSerializer
 
+    # The inputContext must be a hash like { prefix => uri }
+    def initialize(inputContext = nil)
+        @inputContext = inputContext
+    end
+
     # This is the main method to begin the serialization.
     #
     # The subject should be a SemanticObject.
@@ -33,7 +38,7 @@ def process(subject)
 
         # We iterate over all the semantic properties of the subject.
         subject.semanticProperties.each do |property|
-            name = property.name
+            name = @inputContext? self.prefixName(property.name): property.name
             value = property.value
 
             if (value == nil)
@@ -67,7 +72,17 @@ def process(subject)
         return result;
     end
 
-    private 
+    private
+
+        # Replace each URI with its prefix
+        def prefixName(name)
+            @inputContext.each do |prefix, uri|
+                if (!name.start_with?("@") && name.start_with?(uri))
+                    return name.sub(uri, prefix + ':')
+                end
+            end
+            return name
+        end
     
         # Serialize a collection of values.
         def exportCollection(values)
diff --git a/semantizer.gemspec b/semantizer.gemspec
index aaa78e8..bec8e4d 100644
--- a/semantizer.gemspec
+++ b/semantizer.gemspec
@@ -1,6 +1,6 @@
 Gem::Specification.new do |s|
   s.name        = "virtual_assembly-semantizer"
-  s.version     = "1.0.3"
+  s.version     = "1.0.4"
   s.summary     = "Semantizer"
   s.description = "A library to add linked data to your models"
   s.authors     = ["Maxime Lecoq"]