diff --git a/prof.c b/prof.c
index a408b64..5c7f3fd 100644
--- a/prof.c
+++ b/prof.c
@@ -2813,7 +2813,7 @@ void *hook(char *const restrict dst, char *const restrict src, char unsigned siz
 }
 
 #if defined(UTRACY_WINDOWS)
-#	define BYOND_MAX_BUILD 1618
+#	define BYOND_MAX_BUILD 1623
 #	define BYOND_MIN_BUILD 1543
 #	define BYOND_VERSION_ADJUSTED(a) ((a) - BYOND_MIN_BUILD)
 
@@ -2895,10 +2895,15 @@ static int unsigned const byond_offsets[][9] = {
 	[BYOND_VERSION_ADJUSTED(1616)] = {0x004073E0, 0x004073E4, 0x004073F0, 0x00407400,       0x24, 0x00131210, 0x0020B9E0, 0x001C3E20, 0x00050606},
 	[BYOND_VERSION_ADJUSTED(1617)] = {0x004074B0, 0x004074B4, 0x004074C0, 0x004074D0,       0x28, 0x001312D0, 0x0020BAB0, 0x001C3EB0, 0x00050606},
 	[BYOND_VERSION_ADJUSTED(1618)] = {0x004074B0, 0x004074B4, 0x004074C0, 0x004074D0,       0x28, 0x00131350, 0x0020BBA0, 0x001C3F40, 0x00050606},
+	[BYOND_VERSION_ADJUSTED(1619)] = {0x004074B0, 0x004074B4, 0x004074C0, 0x004074D0,       0x28, 0x00131350, 0x0020BBA0, 0x001C3F40, 0x00050606},
+	[BYOND_VERSION_ADJUSTED(1620)] = {0x0040758C, 0x00407590, 0x0040759C, 0x004075AC,       0x28, 0x001313C0, 0x0020BC00, 0x001C3F60, 0x00050606},
+	[BYOND_VERSION_ADJUSTED(1621)] = {0x0040758C, 0x00407590, 0x0040759C, 0x004075AC,       0x28, 0x001313B0, 0x0020BC70, 0x001C3FC0, 0x00050606},
+	[BYOND_VERSION_ADJUSTED(1622)] = {0x0040755C, 0x00407560, 0x0040756C, 0x0040757C,       0x28, 0x001312D0, 0x0020BB90, 0x001C3EB0, 0x00050606},
+	[BYOND_VERSION_ADJUSTED(1623)] = {0x0040755C, 0x00407560, 0x0040756C, 0x0040757C,       0x28, 0x001312D0, 0x0020BB90, 0x001C3EB0, 0x00050606},
 };
 
 #elif defined(UTRACY_LINUX)
-#	define BYOND_MAX_BUILD 1618
+#	define BYOND_MAX_BUILD 1623
 #	define BYOND_MIN_BUILD 1543
 #	define BYOND_VERSION_ADJUSTED(a) ((a) - BYOND_MIN_BUILD)
 
@@ -2978,6 +2983,11 @@ static int unsigned const byond_offsets[][9] = {
 	[BYOND_VERSION_ADJUSTED(1616)] = {0x006D8608, 0x006D860C, 0x006D8620, 0x006D866C,       0x24, 0x00325190, 0x003120F0, 0x00309D30, 0x00050505},
 	[BYOND_VERSION_ADJUSTED(1617)] = {0x006DA978, 0x006DA97C, 0x006DA990, 0x006DA9CC,       0x28, 0x00326510, 0x00313430, 0x0030B070, 0x00050505},
 	[BYOND_VERSION_ADJUSTED(1618)] = {0x006DA6D8, 0x006DA6DC, 0x006DA6F0, 0x006DA72C,       0x28, 0x00326250, 0x00313170, 0x0030ADB0, 0x00050505},
+	[BYOND_VERSION_ADJUSTED(1619)] = {0x006DA698, 0x006DA69C, 0x006DA6B0, 0x006DA6EC,       0x28, 0x00326240, 0x00313160, 0x0030ADA0, 0x00050505},
+	[BYOND_VERSION_ADJUSTED(1620)] = {0x006D61D8, 0x006D61DC, 0x006D61F0, 0x006D622C,       0x28, 0x00324BE0, 0x00311AE0, 0x00309720, 0x00050505},
+	[BYOND_VERSION_ADJUSTED(1621)] = {0x006D8698, 0x006D869C, 0x006D86B0, 0x006D86EC,       0x28, 0x003252F0, 0x003121F0, 0x00309E30, 0x00050505},
+	[BYOND_VERSION_ADJUSTED(1622)] = {0x006D71B8, 0x006D71BC, 0x006D71D0, 0x006D720C,       0x28, 0x00324BC0, 0x00311AC0, 0x00309700, 0x00050505},
+	[BYOND_VERSION_ADJUSTED(1623)] = {0x006D71B8, 0x006D71BC, 0x006D71D0, 0x006D720C,       0x28, 0x00324BD0, 0x00311AD0, 0x00309710, 0x00050505},
 };
 
 #endif
diff --git a/readme.md b/readme.md
index 8eab51b..bb16d33 100644
--- a/readme.md
+++ b/readme.md
@@ -4,6 +4,11 @@ byond-tracy glues together a byond server with the tracy profiler allowing you t
 ## supported byond versions
 | windows  | linux    |
 | -------- | -------- |
+| 515.1623 | 515.1623 |
+| 515.1622 | 515.1622 |
+| 515.1621 | 515.1621 |
+| 515.1620 | 515.1620 |
+| 515.1619 | 515.1619 |
 | 515.1618 | 515.1618 |
 | 515.1617 | 515.1617 |
 | 515.1616 | 515.1616 |