diff --git a/lib/glossarist/concept_manager.rb b/lib/glossarist/concept_manager.rb
index 3203083..75096aa 100644
--- a/lib/glossarist/concept_manager.rb
+++ b/lib/glossarist/concept_manager.rb
@@ -33,7 +33,7 @@ def save_to_files(managed_concepts)
     end
 
     def load_concept_from_file(filename)
-      concept_hash = Psych.safe_load(File.read(filename), permitted_classes: [Date])
+      concept_hash = Psych.safe_load(File.read(filename), permitted_classes: [Date, Time])
       concept_hash["uuid"] = concept_hash["id"] || File.basename(filename, ".*")
 
       concept = ManagedConcept.new(concept_hash)
@@ -50,7 +50,7 @@ def load_concept_from_file(filename)
     def load_localized_concept(id)
       concept_hash = Psych.safe_load(
         File.read(localized_concept_path(id)),
-        permitted_classes: [Date],
+        permitted_classes: [Date, Time],
       )
       concept_hash["uuid"] = id
 
diff --git a/spec/fixtures/relaton_cache/iso/iso_ts_14812_2022.xml b/spec/fixtures/relaton_cache/iso/iso_ts_14812_2022.xml
index d7133cd..a24c432 100644
--- a/spec/fixtures/relaton_cache/iso/iso_ts_14812_2022.xml
+++ b/spec/fixtures/relaton_cache/iso/iso_ts_14812_2022.xml
@@ -1,5 +1,5 @@
-<bibdata type="standard" schema-version="v1.2.5">
-  <fetched>2023-11-28</fetched>
+<bibdata type="standard" schema-version="v1.2.7">
+  <fetched>2023-12-12</fetched>
   <title type="title-intro" format="text/plain" language="en" script="Latn">Intelligent transport systems</title>
   <title type="title-main" format="text/plain" language="en" script="Latn">Vocabulary</title>
   <title type="main" format="text/plain" language="en" script="Latn">Intelligent transport systems - Vocabulary</title>
diff --git a/spec/fixtures/relaton_cache/iso/version b/spec/fixtures/relaton_cache/iso/version
index 9045d30..b3b95af 100644
--- a/spec/fixtures/relaton_cache/iso/version
+++ b/spec/fixtures/relaton_cache/iso/version
@@ -1 +1 @@
-4ff4ff47a5e6abfaa3277f5a26f1707f
\ No newline at end of file
+a03026b6e0501d55c0b281625ab5eb34
\ No newline at end of file