diff --git a/cmake/deps.cmake b/cmake/deps.cmake
index d9d1fe05..89300df1 100644
--- a/cmake/deps.cmake
+++ b/cmake/deps.cmake
@@ -15,7 +15,7 @@ CPMAddPackage(
         "EXPECTED_BUILD_TESTS OFF"
         "EXPECTED_BUILD_PACKAGE_DEB OFF")
 CPMAddPackage(
-    URI "gh:Klebert-Engineering/simfil@0.6.3#improvement/generic-resolve"
+    URI "gh:Klebert-Engineering/simfil#byte-array"
     OPTIONS
         "SIMFIL_WITH_MODEL_JSON ON"
         "SIMFIL_SHARED OFF")
diff --git a/libs/model/include/mapget/model/featurelayer.h b/libs/model/include/mapget/model/featurelayer.h
index fb7dc307..5833a994 100644
--- a/libs/model/include/mapget/model/featurelayer.h
+++ b/libs/model/include/mapget/model/featurelayer.h
@@ -241,7 +241,7 @@ class TileFeatureLayer : public TileLayer, public simfil::ModelPool
      * @param query         Simfil query
      * @param node          Model root node to query
      * @param anyMode       Auto-wrap expression in `any(...)`
-     * @param autoWildcard  Auto expand constant expressions to `** = <expr>`
+     * @param autoWildcard  Auto expand constant expressions to `** == <expr>`
      */
     struct QueryResult {
         // The list of values resulting from the query evaluation.
diff --git a/libs/model/src/featureid.cpp b/libs/model/src/featureid.cpp
index b8154038..6ae25696 100644
--- a/libs/model/src/featureid.cpp
+++ b/libs/model/src/featureid.cpp
@@ -3,6 +3,8 @@
 
 #include <sstream>
 
+#include "mapget/log.h"
+
 namespace mapget
 {
 
@@ -30,8 +32,11 @@ std::string FeatureId::toString() const
 
     auto addIdPart = [&result](auto&& v)
     {
-        if constexpr (!std::is_same_v<std::decay_t<decltype(v)>, std::monostate>)
+        if constexpr (std::is_same_v<std::decay_t<decltype(v)>, simfil::ByteArray>) {
+            raiseFmt("FeatureId part value 'b\"{}\"' cannot be a ByteArray.", v.toHex());
+        } else if constexpr (!std::is_same_v<std::decay_t<decltype(v)>, std::monostate>) {
             result << "." << v;
+        }
     };
 
     // Add common id-part fields
@@ -94,7 +99,11 @@ KeyValueViewPairs FeatureId::keyValuePairs() const
             std::visit(
                 [&result, &keyStr](auto&& v)
                 {
-                    if constexpr (!std::is_same_v<std::decay_t<decltype(v)>, std::monostate> && !std::is_same_v<std::decay_t<decltype(v)>, double>) {
+                    using T = std::decay_t<decltype(v)>;
+                    if constexpr (std::is_same_v<T, simfil::ByteArray>) {
+                        raiseFmt("FeatureId part '{}' cannot be a ByteArray.", keyStr ? *keyStr : "<unknown>");
+                    }
+                    else if constexpr (!std::is_same_v<T, std::monostate> && !std::is_same_v<T, double>) {
                         result.emplace_back(*keyStr, v);
                     }
                 },
diff --git a/libs/pymapget/binding/py-layer.h b/libs/pymapget/binding/py-layer.h
index bc641193..8b149852 100644
--- a/libs/pymapget/binding/py-layer.h
+++ b/libs/pymapget/binding/py-layer.h
@@ -96,8 +96,17 @@ void bindTileLayer(py::module_& m)
                 std::visit(
                     [&](auto&& vv)
                     {
-                        if constexpr (!std::is_same_v<std::decay_t<decltype(vv)>, std::monostate>)
+                        using V = std::decay_t<decltype(vv)>;
+                        if constexpr (std::is_same_v<V, std::monostate>) {
+                            return;
+                        }
+                        else if constexpr (std::is_same_v<V, ByteArray>) {
+                            // Store bytes in hex to keep JSON valid and readable.
+                            self.setInfo(k, vv.toHex());
+                        }
+                        else {
                             self.setInfo(k, vv);
+                        }
                     },
                     v);
             },
@@ -106,7 +115,7 @@ void bindTileLayer(py::module_& m)
             R"pbdoc(
             Set a JSON field to store sizes, construction times,
             and other arbitrary meta-information. The value may be
-            bool, int, double or string.
+            bool, int, double or string. ByteArray values are stored as hex strings.
         )pbdoc")
         .def(
             "set_prefix",