diff --git a/src/strings.bif b/src/strings.bif
index d9728bb938..cc239c0075 100644
--- a/src/strings.bif
+++ b/src/strings.bif
@@ -1251,7 +1251,7 @@ function hexdump%(data_str: string%) : string
 function reverse%(str: string%) : string
 	%{
 	string s = str->ToStdString();
-	reverse(s.begin(), s.end());
+	std::ranges::reverse(s);
 	return zeek::make_intrusive<zeek::StringVal>(s.length(), (const char*)s.c_str());
 	%}
 
@@ -1308,8 +1308,8 @@ static int64_t do_find_str(zeek::StringVal* str, zeek::StringVal* sub, int64_t s
 
 	if ( ! case_sensitive )
 		{
-		transform(s.begin(), s.end(), s.begin(), ::tolower);
-		transform(sb.begin(), sb.end(), sb.begin(), ::tolower);
+		std::ranges::transform(s, s.begin(), ::tolower);
+		std::ranges::transform(sb, sb.begin(), ::tolower);
 		}
 
 	if ( rfind )
diff --git a/src/telemetry/telemetry_functions.bif b/src/telemetry/telemetry_functions.bif
index 8672e864bb..95bbd9331a 100644
--- a/src/telemetry/telemetry_functions.bif
+++ b/src/telemetry/telemetry_functions.bif
@@ -73,7 +73,7 @@ bool labels_valid(std::span<const zeek::telemetry::LabelView> labels,
 		return std::find(keys.begin(), keys.end(), x.first) != keys.end();
 		};
 	return labels.size() == label_names.size()
-	       && std::all_of(labels.begin(), labels.end(), key_in_label_names);
+	       && std::ranges::all_of(labels, key_in_label_names);
 	}
 
 template <class IntOrDbl>