diff --git a/build.zig.zon b/build.zig.zon
index 221cc2bb7d..3221ade708 100644
--- a/build.zig.zon
+++ b/build.zig.zon
@@ -14,8 +14,8 @@
             .hash = "122084badadeb91106dd06b2055119a944c340563536caefd8e22d4064182f7cd6e6",
         },
         .luv = .{
-            .url = "git+https://github.com/luvit/luv?ref=1.51.0-0#6cbf6c959a47b6e3ce0679d89ee14d8ed84788b3",
-            .hash = "N-V-__8AAFglDwBDITf14pNH9v1JzRZneQ_aV_8ytBlzhyNx",
+            .url = "git+https://github.com/luvit/luv?ref=1.51.0-1#4c9fbc6cf6f3338bb0e0426710cf885ee557b540",
+            .hash = "N-V-__8AAMlNDwCY07jUoMiq3iORXdZy0uFWKiHsy8MaDBJA",
         },
         .lua_compat53 = .{
             .url = "https://github.com/lunarmodules/lua-compat-5.3/archive/v0.13.tar.gz",
diff --git a/cmake.deps/deps.txt b/cmake.deps/deps.txt
index 9d54193905..e69636d743 100644
--- a/cmake.deps/deps.txt
+++ b/cmake.deps/deps.txt
@@ -10,8 +10,8 @@ LUA_SHA256 2640fc56a795f29d28ef15e13c34a47e223960b0240e8cb0a82d9b0738695333
 UNIBILIUM_URL https://github.com/neovim/unibilium/archive/v2.1.2.tar.gz
 UNIBILIUM_SHA256 370ecb07fbbc20d91d1b350c55f1c806b06bf86797e164081ccc977fc9b3af7a
 
-LUV_URL https://github.com/luvit/luv/archive/1.51.0-0.tar.gz
-LUV_SHA256 61f49840c067a8dec288dc841ea5cc20e81852d295068805c4ca1d744c82da7d
+LUV_URL https://github.com/luvit/luv/archive/1.51.0-1.tar.gz
+LUV_SHA256 d4a11178ae8e16ba5886799ea91905dd9b0b479c75aebd67866d37373e41526f
 
 LPEG_URL https://github.com/neovim/deps/raw/d495ee6f79e7962a53ad79670cb92488abe0b9b4/opt/lpeg-1.1.0.tar.gz
 LPEG_SHA256 4b155d67d2246c1ffa7ad7bc466c1ea899bbc40fef0257cc9c03cecbaed4352a
diff --git a/runtime/doc/luvref.txt b/runtime/doc/luvref.txt
index 92cbcc8fbc..209939c75e 100644
--- a/runtime/doc/luvref.txt
+++ b/runtime/doc/luvref.txt
@@ -3915,6 +3915,70 @@ uv.sleep({msec})                                                    *uv.sleep()*
 
                 Returns: Nothing.
 
+uv.new_sem([{value}])                                             *uv.new_sem()*
+
+                Parameters:
+                - `value`: `integer` or `nil`
+
+                Creates a new semaphore with the specified initial value. A
+                semaphore is safe to share across threads. It represents an
+                unsigned integer value that can incremented and decremented
+                atomically but any attempt to make it negative will "wait"
+                until the value can be decremented by another thread
+                incrementing it.
+
+                The initial value must be a non-negative integer.
+
+                Returns: `luv_sem_t userdata` or `fail`
+
+                Note: A semaphore must be shared between threads, any
+                `uv.sem_wait()` on a single thread that blocks will deadlock.
+
+uv.sem_post({sem})                                               *uv.sem_post()*
+
+                > method form `sem:post()`
+
+                Parameters:
+                - `sem`: `luv_sem_t userdata`
+
+                Increments (unlocks) a semaphore, if the semaphore's value
+                consequently becomes greater than zero then another thread
+                blocked in a sem_wait call will be woken and proceed to
+                decrement the semaphore.
+
+                Returns: Nothing.
+
+uv.sem_wait({sem})                                               *uv.sem_wait()*
+
+                > method form `sem:wait()`
+
+                Parameters:
+                - `sem`: `luv_sem_t userdata`
+
+                Decrements (locks) a semaphore, if the semaphore's value is
+                greater than zero then the value is decremented and the call
+                returns immediately. If the semaphore's value is zero then the
+                call blocks until the semaphore's value rises above zero or
+                the call is interrupted by a signal.
+
+                Returns: Nothing.
+
+uv.sem_trywait({sem})                                         *uv.sem_trywait()*
+
+                > method form `sem:trywait()`
+
+                Parameters:
+                - `sem`: `luv_sem_t userdata`
+
+                The same as `uv.sem_wait()` but returns immediately if the
+                semaphore is not available.
+
+                If the semaphore's value was decremented then `true` is
+                returned, otherwise the semaphore has a value of zero and
+                `false` is returned.
+
+                Returns: `boolean`
+
 ==============================================================================
 MISCELLANEOUS UTILITIES                            *luv-miscellaneous-utilities*
 
diff --git a/runtime/lua/uv/_meta.lua b/runtime/lua/uv/_meta.lua
index 7283b0236f..a4a9ac2a13 100644
--- a/runtime/lua/uv/_meta.lua
+++ b/runtime/lua/uv/_meta.lua
@@ -3946,6 +3946,62 @@ function luv_thread_t:getname() end
 --- @param msec integer
 function uv.sleep(msec) end
 
+--- Creates a new semaphore with the specified initial value. A semaphore is safe to
+--- share across threads. It represents an unsigned integer value that can incremented
+--- and decremented atomically but any attempt to make it negative will "wait" until
+--- the value can be decremented by another thread incrementing it.
+---
+--- The initial value must be a non-negative integer.
+--- **Note**:
+--- A semaphore must be shared between threads, any `uv.sem_wait()` on a single thread that blocks will deadlock.
+--- @param value integer?
+--- @return uv.luv_sem_t? sem
+--- @return string? err
+--- @return uv.error_name? err_name
+function uv.new_sem(value) end
+
+--- Increments (unlocks) a semaphore, if the semaphore's value consequently becomes
+--- greater than zero then another thread blocked in a sem_wait call will be woken
+--- and proceed to decrement the semaphore.
+--- @param sem uv.luv_sem_t
+function uv.sem_post(sem) end
+
+--- @class uv.luv_sem_t : userdata
+local luv_sem_t = {}
+
+--- Increments (unlocks) a semaphore, if the semaphore's value consequently becomes
+--- greater than zero then another thread blocked in a sem_wait call will be woken
+--- and proceed to decrement the semaphore.
+function luv_sem_t:post() end
+
+--- Decrements (locks) a semaphore, if the semaphore's value is greater than zero
+--- then the value is decremented and the call returns immediately. If the semaphore's
+--- value is zero then the call blocks until the semaphore's value rises above zero or
+--- the call is interrupted by a signal.
+--- @param sem uv.luv_sem_t
+function uv.sem_wait(sem) end
+
+--- Decrements (locks) a semaphore, if the semaphore's value is greater than zero
+--- then the value is decremented and the call returns immediately. If the semaphore's
+--- value is zero then the call blocks until the semaphore's value rises above zero or
+--- the call is interrupted by a signal.
+function luv_sem_t:wait() end
+
+--- The same as `uv.sem_wait()` but returns immediately if the semaphore is not available.
+---
+--- If the semaphore's value was decremented then `true` is returned, otherwise the semaphore
+--- has a value of zero and `false` is returned.
+--- @param sem uv.luv_sem_t
+--- @return boolean
+function uv.sem_trywait(sem) end
+
+--- The same as `uv.sem_wait()` but returns immediately if the semaphore is not available.
+---
+--- If the semaphore's value was decremented then `true` is returned, otherwise the semaphore
+--- has a value of zero and `false` is returned.
+--- @return boolean
+function luv_sem_t:trywait() end
+
 
 --- # Miscellaneous utilities
 
@@ -4474,4 +4530,3 @@ function uv.wtf8_to_utf16(wtf8) end
 --- @class uv.uv_work_t : uv.uv_req_t
 
 --- @class uv.uv_write_t : uv.uv_req_t
-