diff --git a/lib/entry-points.js b/lib/entry-points.js
index 406916cf6..664f590f7 100644
--- a/lib/entry-points.js
+++ b/lib/entry-points.js
@@ -141750,7 +141750,7 @@ var intCoreTag = defineScalarTag("tag:yaml.org,2002:int", {
     ..."0123456789"
   ],
   resolve: resolveYamlInteger$2,
-  identify: (object) => Object.prototype.toString.call(object) === "[object Number]" && object % 1 === 0 && !Object.is(object, -0),
+  identify: (object) => Number.isInteger(object) && !Object.is(object, -0) && object.toString(10).indexOf("e") < 0,
   represent: (object) => object.toString(10)
 });
 var YAML_INTEGER_IMPLICIT_PATTERN = /* @__PURE__ */ new RegExp("^-?(?:0|[1-9][0-9]*)$");
@@ -141778,7 +141778,7 @@ var intJsonTag = defineScalarTag("tag:yaml.org,2002:int", {
   implicit: true,
   implicitFirstChars: ["-", ..."0123456789"],
   resolve: resolveYamlInteger$1,
-  identify: (object) => Object.prototype.toString.call(object) === "[object Number]" && object % 1 === 0 && !Object.is(object, -0),
+  identify: (object) => Number.isInteger(object) && !Object.is(object, -0) && object.toString(10).indexOf("e") < 0,
   represent: (object) => object.toString(10)
 });
 var YAML_INTEGER_PATTERN = /* @__PURE__ */ new RegExp("^(?:[-+]?0b[0-1_]+|[-+]?0[0-7_]+|[-+]?0x[0-9a-fA-F_]+|[-+]?[0-9][0-9_]*(?::[0-5]?[0-9])+|[-+]?(?:0|[1-9][0-9_]*))$");
@@ -141812,7 +141812,7 @@ var intYaml11Tag = defineScalarTag("tag:yaml.org,2002:int", {
     ..."0123456789"
   ],
   resolve: resolveYamlInteger,
-  identify: (object) => Object.prototype.toString.call(object) === "[object Number]" && object % 1 === 0 && !Object.is(object, -0),
+  identify: (object) => Number.isInteger(object) && !Object.is(object, -0) && object.toString(10).indexOf("e") < 0,
   represent: (object) => object.toString(10)
 });
 var YAML_FLOAT_PATTERN$1 = /* @__PURE__ */ new RegExp("^(?:[-+]?[0-9]+(?:\\.[0-9]*)?(?:[eE][-+]?[0-9]+)?|[-+]?\\.[0-9]+(?:[eE][-+]?[0-9]+)?|[-+]?\\.(?:inf|Inf|INF)|\\.(?:nan|NaN|NAN))$");
@@ -141845,7 +141845,7 @@ var floatCoreTag = defineScalarTag("tag:yaml.org,2002:float", {
     ..."0123456789"
   ],
   resolve: resolveYamlFloat$2,
-  identify: (object) => Object.prototype.toString.call(object) === "[object Number]" && (object % 1 !== 0 || Object.is(object, -0)),
+  identify: (object) => typeof object === "number" && (!Number.isInteger(object) || Object.is(object, -0) || object.toString(10).indexOf("e") >= 0),
   represent: representYamlFloat$2
 });
 var YAML_FLOAT_IMPLICIT_PATTERN = /* @__PURE__ */ new RegExp("^-?(?:0|[1-9][0-9]*)(?:\\.[0-9]*)?(?:[eE][-+]?[0-9]+)?$");
@@ -141878,7 +141878,7 @@ var floatJsonTag = defineScalarTag("tag:yaml.org,2002:float", {
   implicit: true,
   implicitFirstChars: ["-", ..."0123456789"],
   resolve: resolveYamlFloat$1,
-  identify: (object) => Object.prototype.toString.call(object) === "[object Number]" && (object % 1 !== 0 || Object.is(object, -0)),
+  identify: (object) => typeof object === "number" && (!Number.isInteger(object) || Object.is(object, -0) || object.toString(10).indexOf("e") >= 0),
   represent: representYamlFloat$1
 });
 var YAML_FLOAT_PATTERN = /* @__PURE__ */ new RegExp("^(?:[-+]?(?:(?:[0-9][0-9_]*)?\\.[0-9_]*)(?:[eE][-+][0-9]+)?|[-+]?[0-9][0-9_]*(?::[0-5]?[0-9])+\\.[0-9_]*|[-+]?\\.(?:inf|Inf|INF)|\\.(?:nan|NaN|NAN))$");
@@ -141915,7 +141915,7 @@ var floatYaml11Tag = defineScalarTag("tag:yaml.org,2002:float", {
     ..."0123456789"
   ],
   resolve: resolveYamlFloat,
-  identify: (object) => Object.prototype.toString.call(object) === "[object Number]" && (object % 1 !== 0 || Object.is(object, -0)),
+  identify: (object) => typeof object === "number" && (!Number.isInteger(object) || Object.is(object, -0) || object.toString(10).indexOf("e") >= 0),
   represent: representYamlFloat
 });
 var mergeTag = defineScalarTag("tag:yaml.org,2002:merge", {
@@ -142614,7 +142614,8 @@ var DEFAULT_CONSTRUCTOR_OPTIONS = {
   filename: "",
   schema: CORE_SCHEMA,
   json: false,
-  maxMergeSeqLength: 20
+  maxTotalMergeKeys: 1e4,
+  maxAliases: -1
 };
 function eventPosition$1(event) {
   if ("tagStart" in event && event.tagStart !== NO_RANGE$2) return event.tagStart;
@@ -142702,6 +142703,7 @@ function isMappingTag(tag) {
 }
 function mergeKeys(state, frame, source, sourceTag) {
   for (const sourceKey of sourceTag.keys(source)) {
+    if (state.maxTotalMergeKeys !== -1 && ++state.totalMergeKeys > state.maxTotalMergeKeys) throwError$1(state, `merge keys exceeded maxTotalMergeKeys (${state.maxTotalMergeKeys})`);
     if (frame.tag.has(frame.value, sourceKey)) continue;
     const err = frame.tag.addPair(frame.value, sourceKey, sourceTag.get(source, sourceKey));
     if (err) throwError$1(state, err);
@@ -142711,14 +142713,8 @@ function mergeKeys(state, frame, source, sourceTag) {
 function mergeSource(state, frame, source, sourceTag) {
   state.position = frame.keyPosition;
   if (isMappingTag(sourceTag)) mergeKeys(state, frame, source, sourceTag);
-  else if (sourceTag.nodeKind === "sequence" && Array.isArray(source)) {
-    const seen = /* @__PURE__ */ new Set();
-    for (const element of source) {
-      if (seen.has(element)) continue;
-      seen.add(element);
-      mergeKeys(state, frame, element, frame.tag);
-    }
-  } else throwError$1(state, "cannot merge mappings; the provided source object is unacceptable");
+  else if (sourceTag.nodeKind === "sequence" && Array.isArray(source)) for (const element of source) mergeKeys(state, frame, element, frame.tag);
+  else throwError$1(state, "cannot merge mappings; the provided source object is unacceptable");
 }
 function addMappingValue(state, frame, key, value, tag) {
   state.position = frame.keyPosition;
@@ -142739,7 +142735,6 @@ function addValue(state, value, tag) {
   } else if (frame.kind === "sequence") {
     if (frame.merge) {
       if (!isMappingTag(tag)) throwError$1(state, "cannot merge mappings; the provided source object is unacceptable");
-      if (frame.index >= state.maxMergeSeqLength) throwError$1(state, `merge sequence length exceeded maxMergeSeqLength (${state.maxMergeSeqLength})`);
     }
     const err = frame.tag.addItem(frame.value, value, frame.index++);
     if (err) throwError$1(state, err);
@@ -142776,7 +142771,9 @@ function constructFromEvents(events, options) {
     position: 0,
     frames: [],
     anchors: /* @__PURE__ */ new Map(),
-    tagHandlers: /* @__PURE__ */ Object.create(null)
+    tagHandlers: /* @__PURE__ */ Object.create(null),
+    totalMergeKeys: 0,
+    aliasCount: 0
   };
   while (state.eventIndex < state.events.length) {
     const event = state.events[state.eventIndex++];
@@ -142784,6 +142781,7 @@ function constructFromEvents(events, options) {
     switch (event.type) {
       case 1:
         state.anchors = /* @__PURE__ */ new Map();
+        state.aliasCount = 0;
         state.tagHandlers = /* @__PURE__ */ Object.create(null);
         for (const directive of event.directives) if (directive.kind === "tag") state.tagHandlers[directive.handle] = directive.prefix;
         state.frames.push({
@@ -142834,6 +142832,7 @@ function constructFromEvents(events, options) {
         break;
       }
       case 5: {
+        if (state.maxAliases !== -1 && ++state.aliasCount > state.maxAliases) throwError$1(state, `aliases exceeded maxAliases (${state.maxAliases})`);
         const name = state.source.slice(event.anchorStart, event.anchorEnd);
         const anchor = state.anchors.get(name);
         if (!anchor) throwError$1(state, `unidentified alias "${name}"`);
@@ -162682,7 +162681,7 @@ tmp/lib/tmp.js:
    *)
 
 js-yaml/dist/js-yaml.mjs:
-  (*! js-yaml 5.1.0 https://github.com/nodeca/js-yaml @license MIT *)
+  (*! js-yaml 5.2.0 https://github.com/nodeca/js-yaml @license MIT *)
 
 long/index.js:
   (**