diff --git a/manifest b/manifest
index 5ccd6fe084..588048d8e9 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Improvements\sto\serror\smessages\sreturned\swhen\sthe\s->>\soperator\sfails.
-D 2023-10-07T17:50:06.014
+C Fix\sthe\sjsonbChangePayloadSize()\sroutine\sso\sthat\sit\sshifts\sthe\spayload\sin\sorder\nto\salways\srender\sthe\smost\scompact\sencoding\sof\sthe\spayload\ssize.\s\sThis\sis\nnecessary\sas\ssometimes\s(as\sdiscovered\sby\sdbsqlfuzz)\sthe\spayload\ssize\scan\ngrow\ssignificantly\sdue\sto\sjson_insert()\sor\sjson_replace().
+D 2023-10-07T19:05:10.497
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -670,7 +670,7 @@ F src/hash.h 3340ab6e1d13e725571d7cee6d3e3135f0779a7d8e76a9ce0a85971fa3953c51
 F src/hwtime.h f9c2dfb84dce7acf95ce6d289e46f5f9d3d1afd328e53da8f8e9008e3b3caae6
 F src/in-operator.md 10cd8f4bcd225a32518407c2fb2484089112fd71
 F src/insert.c 3f0a94082d978bbdd33c38fefea15346c6c6bffb70bc645a71dc0f1f87dd3276
-F src/json.c a5d273004e0b0d4b961efe59b403c5b118218b3db2c2d61b4512ea2815ada8b2
+F src/json.c f526f060002c245769018dc5610bb64c981fb41b239b4d21781c47c6f6e83f1c
 F src/legacy.c d7874bc885906868cd51e6c2156698f2754f02d9eee1bae2d687323c3ca8e5aa
 F src/loadext.c 98cfba10989b3da6f1807ad42444017742db7f100a54f1032af7a8b1295912c0
 F src/main.c 618aeb399e993cf561864f4b0cf6a331ee4f355cf663635f8d9da3193a46aa40
@@ -2124,8 +2124,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 358de1b09f3d5ec0fe459775b0a2a99dfa235817327016b472aaa1ed56d952e6
-R 65b1837fdcd2785b2dbe03dd6bcb09bb
+P 2f3388f14c843f1c02926e8b929365c06c1f1f4ea6fe6316092c3799c14549d3
+R 9d37d6a70144b585d8728dd14898ad5e
 U drh
-Z f25f60a6b37a3fc4a80bb7878104ebfa
+Z 1ec73fd9ef6d1fd16b94f82c874a9e54
 # Remove this line to create a well-formed Fossil manifest.
diff --git a/manifest.uuid b/manifest.uuid
index f4e3476f43..76641696e4 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-2f3388f14c843f1c02926e8b929365c06c1f1f4ea6fe6316092c3799c14549d3
\ No newline at end of file
+8d6d04ca975ec55c419d40d8463c433b0db698c9fb4812ab9f16d4ee5bee460e
\ No newline at end of file
diff --git a/src/json.c b/src/json.c
index fac05a0776..6f31214f55 100644
--- a/src/json.c
+++ b/src/json.c
@@ -2607,24 +2607,55 @@ static void jsonBlobChangePayloadSize(
 ){
   u8 *a;
   u8 szType;
+  u8 nExtra;
+  u8 nNeeded;
+  i8 delta;
   if( pParse->oom ) return;
   a = &pParse->aBlob[i];
   szType = a[0]>>4;
   if( szType<=11 ){
-    assert( szPayload<=11 );
+    nExtra = 0;
+  }else if( szType==12 ){
+    nExtra = 1;
+  }else if( szType==13 ){
+    nExtra = 2;
+  }else{
+    nExtra = 4;
+  }
+  if( szPayload<=11 ){
+    nNeeded = 0;
+  }else if( szPayload<=0xff ){
+    nNeeded = 1;
+  }else if( szPayload<=0xffff ){
+    nNeeded = 2;
+  }else{
+    nNeeded = 4;
+  }
+  delta = nNeeded - nExtra;
+  if( delta ){
+    u32 newSize = pParse->nBlob + delta;
+    if( delta>0 ){
+      if( newSize>pParse->nBlobAlloc && jsonBlobExpand(pParse, newSize) ){
+        return;  /* OOM error.  Error state recorded in pParse->oom. */
+      }
+      a = &pParse->aBlob[i];
+      memmove(&a[1+delta], &a[1], pParse->nBlob - (i+1));
+    }else{
+      memmove(&a[1], &a[1-delta], pParse->nBlob - (i+1-delta));
+    }
+    pParse->nBlob = newSize;
+  }
+  if( nNeeded==0 ){
     a[0] = (a[0] & 0x0f) | (szPayload<<4);
-  }else if( szType==0xc ){
-    assert( szPayload<=0xff );
-    assert( i+1<pParse->nBlob );
+  }else if( nNeeded==1 ){
+    a[0] = (a[0] & 0x0f) | 0xc0;
     a[1] = szPayload & 0xff;
-  }else if( szType==0xd ){
-    assert( szPayload<=0xffff );
-    assert( i+2<pParse->nBlob );
+  }else if( nNeeded==2 ){
+    a[0] = (a[0] & 0x0f) | 0xd0;
     a[1] = (szPayload >> 8) & 0xff;
     a[2] = szPayload & 0xff;
   }else{
-    assert( szType==0xe );
-    assert( i+4<pParse->nBlob );
+    a[0] = (a[0] & 0x0f) | 0xe0;
     a[1] = (szPayload >> 24) & 0xff;
     a[2] = (szPayload >> 16) & 0xff;
     a[3] = (szPayload >> 8) & 0xff;