diff --git a/Components/ScintInt.pas b/Components/ScintInt.pas
index 93825dde0..4e1800b02 100644
--- a/Components/ScintInt.pas
+++ b/Components/ScintInt.pas
@@ -1,7 +1,7 @@
 unit ScintInt;
 
 {
-  Delphi translation of Scintilla.h from Scintilla 5.1.0
+  Delphi translation of Scintilla.h from Scintilla 5.2.4
   created by Jordan Russell and updated by Martijn Laan
 }
 
@@ -27,6 +27,7 @@ interface
   SCI_GETCURRENTPOS = 2008;
   SCI_GETANCHOR = 2009;
   SCI_GETSTYLEAT = 2010;
+  SCI_GETSTYLEINDEXAT = 2038;
   SCI_REDO = 2011;
   SCI_SETUNDOCOLLECTION = 2012;
   SCI_SELECTALL = 2013;
@@ -242,6 +243,8 @@ interface
   SCI_STYLEGETWEIGHT = 2064;
   SCI_STYLESETCHARACTERSET = 2066;
   SCI_STYLESETHOTSPOT = 2409;
+  SCI_STYLESETCHECKMONOSPACED = 2254;
+  SCI_STYLEGETCHECKMONOSPACED = 2255;
   SC_ELEMENT_LIST = 0;
   SC_ELEMENT_LIST_BACK = 1;
   SC_ELEMENT_LIST_SELECTED = 2;
@@ -261,6 +264,8 @@ interface
   SC_ELEMENT_WHITE_SPACE_BACK = 61;
   SC_ELEMENT_HOT_SPOT_ACTIVE = 70;
   SC_ELEMENT_HOT_SPOT_ACTIVE_BACK = 71;
+  SC_ELEMENT_FOLD_LINE = 80;
+  SC_ELEMENT_HIDDEN_LINE = 81;
   SCI_SETELEMENTCOLOUR = 2753;
   SCI_GETELEMENTCOLOUR = 2754;
   SCI_RESETELEMENTCOLOUR = 2755;
@@ -280,6 +285,8 @@ interface
   SCI_SETSELECTIONLAYER = 2763;
   SCI_GETCARETLINELAYER = 2764;
   SCI_SETCARETLINELAYER = 2765;
+  SCI_GETCARETLINEHIGHLIGHTSUBLINE = 2773;
+  SCI_SETCARETLINEHIGHLIGHTSUBLINE = 2774;
   SCI_SETCARETFORE = 2069;
   SCI_ASSIGNCMDKEY = 2070;
   SCI_CLEARCMDKEY = 2071;
@@ -375,6 +382,10 @@ interface
   SCI_USERLISTSHOW = 2117;
   SCI_AUTOCSETAUTOHIDE = 2118;
   SCI_AUTOCGETAUTOHIDE = 2119;
+  SC_AUTOCOMPLETE_NORMAL = 0;
+  SC_AUTOCOMPLETE_FIXED_SIZE = 1;
+  SCI_AUTOCSETOPTIONS = 2638;
+  SCI_AUTOCGETOPTIONS = 2639;
   SCI_AUTOCSETDROPRESTOFWORD = 2270;
   SCI_AUTOCGETDROPRESTOFWORD = 2271;
   SCI_REGISTERIMAGE = 2405;
@@ -434,10 +445,13 @@ interface
   SCFIND_POSIX = $00400000;
   SCFIND_CXX11REGEX = $00800000;
   SCI_FINDTEXT = 2150;
+  SCI_FINDTEXTFULL = 2196;
   SCI_FORMATRANGE = 2151;
+  SCI_FORMATRANGEFULL = 2777;
   SCI_GETFIRSTVISIBLELINE = 2152;
   SCI_GETLINE = 2153;
   SCI_GETLINECOUNT = 2154;
+  SCI_ALLOCATELINES = 2089;
   SCI_SETMARGINLEFT = 2155;
   SCI_GETMARGINLEFT = 2156;
   SCI_SETMARGINRIGHT = 2157;
@@ -446,6 +460,7 @@ interface
   SCI_SETSEL = 2160;
   SCI_GETSELTEXT = 2161;
   SCI_GETTEXTRANGE = 2162;
+  SCI_GETTEXTRANGEFULL = 2039;
   SCI_HIDESELECTION = 2163;
   SCI_POINTXFROMPOSITION = 2164;
   SCI_POINTYFROMPOSITION = 2165;
@@ -867,6 +882,7 @@ interface
   CARETSTYLE_BLOCK = 2;
   CARETSTYLE_OVERSTRIKE_BAR = 0;
   CARETSTYLE_OVERSTRIKE_BLOCK = $10;
+  CARETSTYLE_CURSES = $20;
   CARETSTYLE_INS_MASK = $F;
   CARETSTYLE_BLOCK_AFTER = $100;
   SCI_SETCARETSTYLE = 2512;
@@ -883,6 +899,8 @@ interface
   SCI_INDICATOREND = 2509;
   SCI_SETPOSITIONCACHE = 2514;
   SCI_GETPOSITIONCACHE = 2515;
+  SCI_SETLAYOUTTHREADS = 2775;
+  SCI_GETLAYOUTTHREADS = 2776;
   SCI_COPYALLOWLINE = 2519;
   SCI_GETCHARACTERPOINTER = 2520;
   SCI_GETRANGEPOINTER = 2643;
@@ -1060,6 +1078,7 @@ interface
   SC_SUPPORTS_FRACTIONAL_STROKE_WIDTH = 2;
   SC_SUPPORTS_TRANSLUCENT_STROKE = 3;
   SC_SUPPORTS_PIXEL_MODIFICATION = 4;
+  SC_SUPPORTS_THREAD_SAFE_MEASURE_WIDTHS = 5;
   SCI_SUPPORTSFEATURE = 2750;
   SC_LINECHARACTERINDEX_NONE = 0;
   SC_LINECHARACTERINDEX_UTF32 = 1;
@@ -1218,7 +1237,7 @@   TSci_CharacterRange = record
     cpMin: TSci_PositionCR;
     cpMax: TSci_PositionCR;
   end;
-
+  
   TSci_TextRange = record
     chrg: TSci_CharacterRange;
     lpstrText: PAnsiChar;
diff --git a/Files/isscint.dll b/Files/isscint.dll
index ee051f0e2..a6eee26a5 100644
Binary files a/Files/isscint.dll and b/Files/isscint.dll differ
diff --git a/Projects/Src/CompScintEdit.pas b/Projects/Src/CompScintEdit.pas
index 19abb3552..bb78eb9e2 100644
--- a/Projects/Src/CompScintEdit.pas
+++ b/Projects/Src/CompScintEdit.pas
@@ -157,6 +157,12 @@ procedure TCompScintEdit.CreateWnd;
             properties."
     -5.0.1: Review using SCI_INDICSETSTROKEWIDTH for high DPI support on
             INDIC_SQUIGGLE.
+    -5.2.3: "Applications should move to SCI_GETTEXTRANGEFULL, SCI_FINDTEXTFULL,
+            and SCI_FORMATRANGEFULL from their predecessors as they will be
+            deprecated." So our use of SCI_GETTEXTRANGE and SCI_FORMATRANGE needs
+            to be updated but that also means we should do many more changes to
+            replace all the Integer positions with NativeInt positions. Does not
+            actually change anything until there's a 64-bit build...
     -5.3.0: "Stop including STYLE_CALLTIP when calculating line height. Allows a
             large font to be used for calltips without affecting text display."
             Allows cleanup of our STYLE_AUTOCOMPLETION patch.