diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3ac1d5951..4c52ccdb7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,12 @@ This is the changelog for the Fabric modpack [Fabulously Optimized](https://www.
 
 ## 1.17.1
 
+### 2.4.0
+
+* Updated Fabric Loader to 0.12.5
+* You may start preparing your worlds for 1.18 by clicking `Edit` -> `Optimize World` -> `Create Backup and Load` in the world list. [Read more](https://github.com/CaffeineMC/lithium-fabric/releases/tag/mc1.17.1-0.7.5#repo-content-pjax-container)
+* Updated 'Slight' GUI Modifications, Fabric API, Lithium, LittleTweaks
+
 ### 2.3.3
 
 * Updated Fabric API, Fabric Capes, Language Reload
diff --git a/Curseforge/manifest.json b/Curseforge/manifest.json
index 96e2affdd..a54f34158 100644
--- a/Curseforge/manifest.json
+++ b/Curseforge/manifest.json
@@ -3,7 +3,7 @@
     "version": "1.17.1",
     "modLoaders": [
       {
-        "id": "fabric-0.11.7",
+        "id": "fabric-0.12.5",
         "primary": true
       }
     ]
@@ -11,7 +11,7 @@
   "manifestType": "minecraftModpack",
   "manifestVersion": 1,
   "name": "Fabulously Optimized",
-  "version": "2.3.2",
+  "version": "2.4.0",
   "author": "robotkoer",
   "files": [
     {
@@ -26,7 +26,7 @@
     },
     {
       "projectID": 306612,
-      "fileID": 3494349,
+      "fileID": 3517689,
       "required": true
     },
     {
@@ -51,7 +51,7 @@
     },
     {
       "projectID": 527334,
-      "fileID": 3477612,
+      "fileID": 3510259,
       "required": true
     },
     {
@@ -116,7 +116,7 @@
     },
     {
       "projectID": 380393,
-      "fileID": 3381516,
+      "fileID": 3512331,
       "required": true
     },
     {
@@ -126,7 +126,7 @@
     },
     {
       "projectID": 408481,
-      "fileID": 3420209,
+      "fileID": 3510854,
       "required": true
     },
     {
@@ -176,7 +176,7 @@
     },
     {
       "projectID": 527975,
-      "fileID": 3478188,
+      "fileID": 3519804,
       "required": true
     },
     {
@@ -221,7 +221,7 @@
     },
     {
       "projectID": 360438,
-      "fileID": 3438799,
+      "fileID": 3516367,
       "required": true
     },
     {
diff --git a/Modrinth/index.json b/Modrinth/index.json
index cd815b3d7..e317350bd 100644
--- a/Modrinth/index.json
+++ b/Modrinth/index.json
@@ -1,7 +1,7 @@
 {
     "formatVersion": 1,
     "game": "minecraft",
-    "versionId": "2.3.3",
+    "versionId": "2.4.0",
     "name": "Fabulously Optimized",
     "summary": "A Fabric-based modpack for Minecraft that focuses on performance and graphics optimizations",
     "files": [
@@ -168,12 +168,12 @@
             ]
         },
         {
-            "path": "mods/fabric-api-0.41.3+1.17.jar",
+            "path": "mods/fabric-api-0.42.1+1.17.jar",
             "hashes": {
-                "murmur2": "2986694412"
+                "murmur2": "1200955640"
             },
             "downloads": [
-                "https://edge.forgecdn.net/files/3510/335/fabric-api-0.41.3+1.17.jar"
+                "https://edge.forgecdn.net/files/3517/689/fabric-api-0.42.1+1.17.jar"
             ]
         },
         {
@@ -276,21 +276,21 @@
             ]
         },
         {
-            "path": "mods/lithium-fabric-mc1.17.1-0.7.4.jar",
+            "path": "mods/lithium-fabric-mc1.17.1-0.7.5.jar",
             "hashes": {
-                "murmur2": "1031734912"
+                "murmur2": "1827400379"
             },
             "downloads": [
-                "https://edge.forgecdn.net/files/3438/799/lithium-fabric-mc1.17.1-0.7.4.jar"
+                "https://edge.forgecdn.net/files/3516/367/lithium-fabric-mc1.17.1-0.7.5.jar"
             ]
         },
         {
-            "path": "mods/littletweaks-0.1.1.jar",
+            "path": "mods/littletweaks-1.0.0.jar",
             "hashes": {
-                "murmur2": "48414495"
+                "murmur2": "3895033168"
             },
             "downloads": [
-                "https://edge.forgecdn.net/files/3478/188/littletweaks-0.1.1.jar"
+                "https://edge.forgecdn.net/files/3519/804/littletweaks-1.0.0.jar"
             ]
         },
         {
@@ -348,12 +348,12 @@
             ]
         },
         {
-            "path": "mods/slight-gui-modifications-2.0.1.jar",
+            "path": "mods/slight-gui-modifications-2.0.2.jar",
             "hashes": {
-                "murmur2": "1523527604"
+                "murmur2": "2554437827"
             },
             "downloads": [
-                "https://edge.forgecdn.net/files/3381/516/slight-gui-modifications-2.0.1.jar"
+                "https://edge.forgecdn.net/files/3512/331/slight-gui-modifications-2.0.2.jar"
             ]
         },
         {
diff --git a/MultiMC-Packwiz/Fabulously Optimized (auto-update)/.packignore b/MultiMC-Packwiz/Fabulously Optimized (auto-update)/.packignore
index 4151ddf4f..22ab961ae 100644
--- a/MultiMC-Packwiz/Fabulously Optimized (auto-update)/.packignore	
+++ b/MultiMC-Packwiz/Fabulously Optimized (auto-update)/.packignore	
@@ -1,18 +1,6 @@
-.minecraft/.fabric
-.minecraft/.mixin.out
-.minecraft/ModTranslations
-.minecraft/config
 .minecraft/coremods
-.minecraft/icon.png
-.minecraft/logs
 .minecraft/mods
-.minecraft/options.txt
-.minecraft/packwiz-installer.jar
-.minecraft/packwiz.json
-.minecraft/realms_persistence.json
 .minecraft/resourcepacks
 .minecraft/saves
 .minecraft/screenshots
-.minecraft/server-resource-packs
-.minecraft/texturepacks
-natives
\ No newline at end of file
+.minecraft/texturepacks
\ No newline at end of file
diff --git a/MultiMC-Packwiz/Fabulously Optimized (auto-update)/instance.cfg b/MultiMC-Packwiz/Fabulously Optimized (auto-update)/instance.cfg
index a510a1388..bba63b724 100644
--- a/MultiMC-Packwiz/Fabulously Optimized (auto-update)/instance.cfg	
+++ b/MultiMC-Packwiz/Fabulously Optimized (auto-update)/instance.cfg	
@@ -18,11 +18,11 @@ OverrideMCLaunchMethod=false
 OverrideMemory=true
 OverrideNativeWorkarounds=false
 OverrideWindow=false
-PreLaunchCommand="$INST_JAVA" -jar packwiz-installer-bootstrap.jar https://raw.githubusercontent.com/Madis0/fabulously-optimized/main/Packwiz/1.17.1/pack.toml
 PermGen=128
+PostExitCommand=
+PreLaunchCommand="$INST_JAVA" -jar packwiz-installer-bootstrap.jar https://raw.githubusercontent.com/Madis0/fabulously-optimized/main/Packwiz/1.17.1/pack.toml
+WrapperCommand=
 iconKey=pack
 lastLaunchTime=1632412009561
-lastTimePlayed=125
 name=Fabulously Optimized (MC 1.17.1 auto-update)
 notes=https://github.com/Fabulously-Optimized/fabulously-optimized
-totalTimePlayed=100
diff --git a/MultiMC/Fabulously Optimized x.y.z/.packignore b/MultiMC/Fabulously Optimized x.y.z/.packignore
new file mode 100644
index 000000000..245c8c5c4
--- /dev/null
+++ b/MultiMC/Fabulously Optimized x.y.z/.packignore	
@@ -0,0 +1,4 @@
+minecraft/coremods
+minecraft/saves
+minecraft/screenshots
+minecraft/texturepacks
\ No newline at end of file
diff --git a/MultiMC/Fabulously Optimized x.y.z/instance.cfg b/MultiMC/Fabulously Optimized x.y.z/instance.cfg
index 70df0ccc9..84d1e476e 100644
--- a/MultiMC/Fabulously Optimized x.y.z/instance.cfg	
+++ b/MultiMC/Fabulously Optimized x.y.z/instance.cfg	
@@ -21,5 +21,5 @@ OverrideWindow=false
 PermGen=128
 iconKey=pack
 lastLaunchTime=1634574367356
-name=Fabulously Optimized 2.3.3
+name=Fabulously Optimized 2.4.0
 notes=https://www.curseforge.com/minecraft/modpacks/fabulously-optimized
diff --git a/MultiMC/Fabulously Optimized x.y.z/mmc-pack.json b/MultiMC/Fabulously Optimized x.y.z/mmc-pack.json
index dd03dc1e5..4b7cc2198 100644
--- a/MultiMC/Fabulously Optimized x.y.z/mmc-pack.json	
+++ b/MultiMC/Fabulously Optimized x.y.z/mmc-pack.json	
@@ -43,9 +43,9 @@
                     "uid": "net.fabricmc.intermediary"
                 }
             ],
-            "cachedVersion": "0.11.7",
+            "cachedVersion": "0.12.5",
             "uid": "net.fabricmc.fabric-loader",
-            "version": "0.11.7"
+            "version": "0.12.5"
         }
     ],
     "formatVersion": 1
diff --git a/Packwiz/1.17.1/config/slightguimodifications/cts.groovy b/Packwiz/1.17.1/config/slightguimodifications/cts.groovy
index 6890bfbed..e41254325 100644
--- a/Packwiz/1.17.1/config/slightguimodifications/cts.groovy
+++ b/Packwiz/1.17.1/config/slightguimodifications/cts.groovy
@@ -5,7 +5,7 @@ mainMenu {
             x { it - 2 }
             y { it - 20 }
         }
-        text = literal("Fabulously Optimized 2.3.3")
+        text = literal("Fabulously Optimized 2.4.0")
         align = "right"
         color = 0xFFFFFF
         hoveredColor = 0x55FFFF
diff --git a/Packwiz/1.17.1/config/midnightlib.json b/Packwiz/1.17.1/config/yosbr/config/midnightlib.json
similarity index 100%
rename from Packwiz/1.17.1/config/midnightlib.json
rename to Packwiz/1.17.1/config/yosbr/config/midnightlib.json
diff --git a/Packwiz/1.17.1/config/yosbr/options.txt b/Packwiz/1.17.1/config/yosbr/options.txt
index 25b3b25ee..03a99b259 100644
--- a/Packwiz/1.17.1/config/yosbr/options.txt
+++ b/Packwiz/1.17.1/config/yosbr/options.txt
@@ -1,4 +1,4 @@
-version:2724
+version:2730
 autoJump:false
 snooperEnabled:false
 darkMojangStudiosBackground:true
diff --git a/Packwiz/1.17.1/index.toml b/Packwiz/1.17.1/index.toml
index a2fcb365a..81d2cb99c 100644
--- a/Packwiz/1.17.1/index.toml
+++ b/Packwiz/1.17.1/index.toml
@@ -8,13 +8,9 @@ hash = "c0ea016e992b3093ebf05ecbb099361b0c11e8cc4dc53c81aa959b0a5fc42381"
 file = "config/fabric_loader_dependencies.json"
 hash = "84b82b6a4610dcf0f2992d3b86a3abfb8748c54ada513020bae4154581f012ea"
 
-[[files]]
-file = "config/midnightlib.json"
-hash = "8bffacf0777bdc9e35022109e9580583d40fcaa05f0abfed1bf32220a5b39ab3"
-
 [[files]]
 file = "config/slightguimodifications/cts.groovy"
-hash = "906521d6179ed60f12015592a23b9040f7597c62f79bb386bb5e9431a20a7e5d"
+hash = "35d14c771ad88489bca62bee751dba9f669988016bfa65b9fc26de26a151bcb9"
 
 [[files]]
 file = "config/sodium-mixins.properties"
@@ -52,6 +48,10 @@ hash = "2744ebcd3589f1124ab556b12e3d73b878fe89901789fdf18787cca12e6a6c0b"
 file = "config/yosbr/config/lambdynlights.toml"
 hash = "1a0c50101df35b82a3015882331c4b1b76bec59a05c25cac50bff3547b891f25"
 
+[[files]]
+file = "config/yosbr/config/midnightlib.json"
+hash = "8bffacf0777bdc9e35022109e9580583d40fcaa05f0abfed1bf32220a5b39ab3"
+
 [[files]]
 file = "config/yosbr/config/modmenu.json"
 hash = "cf0aaef402dc0b2be5b09f9f9a99f81c9ff64f585e077b0fdad7655b13a6055c"
@@ -70,7 +70,7 @@ hash = "7e597a01436a7da6f68b3456848ad6b6a000c0efad3e5c04d75249b1df170b18"
 
 [[files]]
 file = "config/yosbr/options.txt"
-hash = "ef7dc96d24f915a87d55e51748a4c06a34bf7a65114e7e7d67f6e1ed2a2a4d7e"
+hash = "040239c0e00a49830917b1b2e2332a393b7d90f5366b5e1efd846a51df8b815d"
 
 [[files]]
 file = "mods/advancementinfo.toml"
@@ -164,7 +164,7 @@ metafile = true
 
 [[files]]
 file = "mods/fabric-api.toml"
-hash = "27cbbc3381dc442d0806faf0ea89f8ecf732c518332d265f365e0cb88d5e5058"
+hash = "76fac2cfd09d5b73e428a698f9ad1fc4e7ed59f807997d848c5bf9a5024a87ac"
 metafile = true
 
 [[files]]
@@ -224,12 +224,12 @@ metafile = true
 
 [[files]]
 file = "mods/lithium.toml"
-hash = "290f25ecb199d3010dd5fa5ce6e148577766e0a362129cfa5de6250bfe2702d1"
+hash = "b68e9befb8f9dff5f8d548c6c2be177b2dcf5f49f5f3b99fe3b31dac9ec91659"
 metafile = true
 
 [[files]]
 file = "mods/littletweaks.toml"
-hash = "4551539b96ebf730cd9221ec90bcd562340be4fd21921547b5d6ee3ffdfe31fa"
+hash = "66e256d0483ce706769e675498fedf4d7e94edf587944faa58615b86d5c9041b"
 metafile = true
 
 [[files]]
@@ -264,7 +264,7 @@ metafile = true
 
 [[files]]
 file = "mods/slight-gui-modifications.toml"
-hash = "cc5d7a90874f5022a32a51f00b61513538278b13819321193cf953ba0b7e6cfd"
+hash = "e0dbfb0ae19e329c972716748125ff0722c87eb4c63f3b4b7dda28361a6cf83d"
 metafile = true
 
 [[files]]
diff --git a/Packwiz/1.17.1/mods/fabric-api.toml b/Packwiz/1.17.1/mods/fabric-api.toml
index aa2886212..b6091da14 100644
--- a/Packwiz/1.17.1/mods/fabric-api.toml
+++ b/Packwiz/1.17.1/mods/fabric-api.toml
@@ -1,14 +1,14 @@
 name = "Fabric API"
-filename = "fabric-api-0.41.3+1.17.jar"
+filename = "fabric-api-0.42.1+1.17.jar"
 side = "both"
 
 [download]
-url = "https://edge.forgecdn.net/files/3510/335/fabric-api-0.41.3+1.17.jar"
+url = "https://edge.forgecdn.net/files/3517/689/fabric-api-0.42.1+1.17.jar"
 hash-format = "murmur2"
-hash = "2986694412"
+hash = "1200955640"
 
 [update]
 [update.curseforge]
-file-id = 3510335
+file-id = 3517689
 project-id = 306612
 release-channel = "beta"
diff --git a/Packwiz/1.17.1/mods/lithium.toml b/Packwiz/1.17.1/mods/lithium.toml
index 16c139b8c..1de8a96d3 100644
--- a/Packwiz/1.17.1/mods/lithium.toml
+++ b/Packwiz/1.17.1/mods/lithium.toml
@@ -1,14 +1,14 @@
 name = "Lithium (Fabric)"
-filename = "lithium-fabric-mc1.17.1-0.7.4.jar"
+filename = "lithium-fabric-mc1.17.1-0.7.5.jar"
 side = "both"
 
 [download]
-url = "https://edge.forgecdn.net/files/3438/799/lithium-fabric-mc1.17.1-0.7.4.jar"
+url = "https://edge.forgecdn.net/files/3516/367/lithium-fabric-mc1.17.1-0.7.5.jar"
 hash-format = "murmur2"
-hash = "1031734912"
+hash = "1827400379"
 
 [update]
 [update.curseforge]
-file-id = 3438799
+file-id = 3516367
 project-id = 360438
 release-channel = "beta"
diff --git a/Packwiz/1.17.1/mods/littletweaks.toml b/Packwiz/1.17.1/mods/littletweaks.toml
index 6b4ee4c3d..ec94ab219 100644
--- a/Packwiz/1.17.1/mods/littletweaks.toml
+++ b/Packwiz/1.17.1/mods/littletweaks.toml
@@ -1,14 +1,14 @@
 name = "LittleTweaks"
-filename = "littletweaks-0.1.1.jar"
+filename = "littletweaks-1.0.0.jar"
 side = "both"
 
 [download]
-url = "https://edge.forgecdn.net/files/3478/188/littletweaks-0.1.1.jar"
+url = "https://edge.forgecdn.net/files/3519/804/littletweaks-1.0.0.jar"
 hash-format = "murmur2"
-hash = "48414495"
+hash = "3895033168"
 
 [update]
 [update.curseforge]
-file-id = 3478188
+file-id = 3519804
 project-id = 527975
 release-channel = "beta"
diff --git a/Packwiz/1.17.1/mods/slight-gui-modifications.toml b/Packwiz/1.17.1/mods/slight-gui-modifications.toml
index f44507cf0..3c043fbd4 100644
--- a/Packwiz/1.17.1/mods/slight-gui-modifications.toml
+++ b/Packwiz/1.17.1/mods/slight-gui-modifications.toml
@@ -1,14 +1,14 @@
 name = "'Slight' Gui Modifications"
-filename = "slight-gui-modifications-2.0.1.jar"
+filename = "slight-gui-modifications-2.0.2.jar"
 side = "both"
 
 [download]
-url = "https://edge.forgecdn.net/files/3381/516/slight-gui-modifications-2.0.1.jar"
+url = "https://edge.forgecdn.net/files/3512/331/slight-gui-modifications-2.0.2.jar"
 hash-format = "murmur2"
-hash = "1523527604"
+hash = "2554437827"
 
 [update]
 [update.curseforge]
-file-id = 3381516
+file-id = 3512331
 project-id = 380393
 release-channel = "beta"
diff --git a/Packwiz/1.17.1/pack.toml b/Packwiz/1.17.1/pack.toml
index 3257e1fdb..b9af094d9 100644
--- a/Packwiz/1.17.1/pack.toml
+++ b/Packwiz/1.17.1/pack.toml
@@ -3,7 +3,7 @@ name = "Fabulously Optimized"
 [index]
 file = "index.toml"
 hash-format = "sha256"
-hash = "9476b06475f5e9cf146ce7c2fa1e117110668122c403fb589a13be855a1dc65e"
+hash = "da06f1acdf6c76cd746f09eb8cc448e64a033c8eb493f03ff1691855578ae0af"
 
 [versions]
 fabric = "0.11.7"