diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7711171..aea3979 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -40,7 +40,7 @@ option(MCCOUTLET_BUILD_CLI "Build the CLI application" ON)
 # liblsl Dependency
 # =============================================================================
 set(LSL_INSTALL_ROOT "" CACHE PATH "Path to installed liblsl (optional)")
-set(LSL_FETCH_REF "v1.18.0.b5" CACHE STRING "liblsl version to fetch from GitHub")
+set(LSL_FETCH_REF "v1.18.0.b6" CACHE STRING "liblsl version to fetch from GitHub")
 
 if(LSL_INSTALL_ROOT)
     find_package(LSL REQUIRED
diff --git a/README.md b/README.md
index 15d3f28..f8a7c6e 100644
--- a/README.md
+++ b/README.md
@@ -105,7 +105,7 @@ uldaq is fetched and built automatically from source (via `ExternalProject`). No
 | `MCCOUTLET_BUILD_CLI`  | ON      | Build the CLI application                        |
 | `ULDAQ_GIT_TAG`        | v1.2.1  | uldaq version to fetch from GitHub               |
 | `LSL_INSTALL_ROOT`     | -       | Path to installed liblsl (skips FetchContent)    |
-| `LSL_FETCH_REF`        | v1.17.4 | liblsl git ref to fetch                          |
+| `LSL_FETCH_REF`        | v1.18.0.b6 | liblsl git ref to fetch                          |
 
 ### CLI-Only Build