diff --git a/modpacks/rc-plus/26.1.2-mr/index.toml b/modpacks/rc-plus/26.1.2-mr/index.toml
index a2edefd5f..88a6309f9 100644
--- a/modpacks/rc-plus/26.1.2-mr/index.toml
+++ b/modpacks/rc-plus/26.1.2-mr/index.toml
@@ -1630,6 +1630,11 @@ file = "mods/modernfix-mvus.pw.toml"
 hash = "dc12b3aba319df85cefde7e6fb0e89e59399fa304a2bbfacf812fb240c06380b"
 metafile = true
 
+[[files]]
+file = "mods/modernregsyncfix.pw.toml"
+hash = "8b4660bed37cbb216d66fbc24755ff641acf891f02b14dddc114f878f6d1e9f7"
+metafile = true
+
 [[files]]
 file = "mods/modmenu.pw.toml"
 hash = "a3b2043845ab8f258b02e6cefe35e20f836ccc1e30acd6758fc98a772be87828"
diff --git a/modpacks/rc-plus/26.1.2-mr/mods/modernregsyncfix.pw.toml b/modpacks/rc-plus/26.1.2-mr/mods/modernregsyncfix.pw.toml
new file mode 100644
index 000000000..6695b7f8f
--- /dev/null
+++ b/modpacks/rc-plus/26.1.2-mr/mods/modernregsyncfix.pw.toml
@@ -0,0 +1,15 @@
+name = "ModernRegSyncFix"
+filename = "modernregsyncfix-2.0.0.jar"
+side = "both"
+
+[download]
+url = "https://github.com/DexrnZacAttack/ModernRegSyncFix/releases/download/2.0.0/modernregsyncfix-2.0.0.jar"
+hash-format = "sha256"
+hash = "3238d7ba9a8e7cb5a5fbb280667c37307dbd7531b7cf8792dd17000b69d66752"
+
+[update]
+[update.github]
+branch = "master"
+regex = "^.+(?<!-api|-dev|-dev-preshadow|-sources)\\.jar$"
+slug = "DexrnZacAttack/ModernRegSyncFix"
+tag = "2.0.0"
diff --git a/modpacks/rc-plus/26.1.2-mr/pack.toml b/modpacks/rc-plus/26.1.2-mr/pack.toml
index 7c7d6746b..9f5ee0d1e 100644
--- a/modpacks/rc-plus/26.1.2-mr/pack.toml
+++ b/modpacks/rc-plus/26.1.2-mr/pack.toml
@@ -6,7 +6,7 @@ pack-format = "packwiz:1.1.0"
 [index]
 file = "index.toml"
 hash-format = "sha256"
-hash = "50fd4b1382c71dce5f463086e50e20711e09ffe4b5cfb032b2104decedb5d782"
+hash = "e2200a40319280fe551d80989c4ae6767728c506e6c224b89112cdebace335be"
 
 [versions]
 fabric = "0.19.2"
diff --git a/modpacks/simply/26.1.2-mr/index.toml b/modpacks/simply/26.1.2-mr/index.toml
index 7af8d5999..faf504950 100644
--- a/modpacks/simply/26.1.2-mr/index.toml
+++ b/modpacks/simply/26.1.2-mr/index.toml
@@ -921,6 +921,11 @@ file = "mods/modernfix-mvus.pw.toml"
 hash = "dc12b3aba319df85cefde7e6fb0e89e59399fa304a2bbfacf812fb240c06380b"
 metafile = true
 
+[[files]]
+file = "mods/modernregsyncfix.pw.toml"
+hash = "8b4660bed37cbb216d66fbc24755ff641acf891f02b14dddc114f878f6d1e9f7"
+metafile = true
+
 [[files]]
 file = "mods/modmenu.pw.toml"
 hash = "a3b2043845ab8f258b02e6cefe35e20f836ccc1e30acd6758fc98a772be87828"
diff --git a/modpacks/simply/26.1.2-mr/mods/modernregsyncfix.pw.toml b/modpacks/simply/26.1.2-mr/mods/modernregsyncfix.pw.toml
new file mode 100644
index 000000000..6695b7f8f
--- /dev/null
+++ b/modpacks/simply/26.1.2-mr/mods/modernregsyncfix.pw.toml
@@ -0,0 +1,15 @@
+name = "ModernRegSyncFix"
+filename = "modernregsyncfix-2.0.0.jar"
+side = "both"
+
+[download]
+url = "https://github.com/DexrnZacAttack/ModernRegSyncFix/releases/download/2.0.0/modernregsyncfix-2.0.0.jar"
+hash-format = "sha256"
+hash = "3238d7ba9a8e7cb5a5fbb280667c37307dbd7531b7cf8792dd17000b69d66752"
+
+[update]
+[update.github]
+branch = "master"
+regex = "^.+(?<!-api|-dev|-dev-preshadow|-sources)\\.jar$"
+slug = "DexrnZacAttack/ModernRegSyncFix"
+tag = "2.0.0"
diff --git a/modpacks/simply/26.1.2-mr/pack.toml b/modpacks/simply/26.1.2-mr/pack.toml
index 03ba533c7..0d062ee6e 100644
--- a/modpacks/simply/26.1.2-mr/pack.toml
+++ b/modpacks/simply/26.1.2-mr/pack.toml
@@ -6,7 +6,7 @@ pack-format = "packwiz:1.1.0"
 [index]
 file = "index.toml"
 hash-format = "sha256"
-hash = "ace5178078485ddc87b3fae0a5c5e79f8f05350f450ad1ea82dc1f480072af00"
+hash = "8e1730528581cec20c8c7483f5cada54b5852fa3c820511e42812d1f38dadcbd"
 
 [versions]
 fabric = "0.19.2"