diff --git a/.github/workflows/build-without-conan.yml b/.github/workflows/build-without-conan.yml
index cf12199431..9058f60f92 100644
--- a/.github/workflows/build-without-conan.yml
+++ b/.github/workflows/build-without-conan.yml
@@ -96,9 +96,9 @@ jobs:
     - name: Install pybind11
       run: |
         cd ${TMP_DIR}
-        wget https://github.com/pybind/pybind11/archive/refs/tags/v2.13.1.tar.gz
-        tar xzvf v2.13.1.tar.gz
-        cd pybind11-2.13.1/
+        wget https://github.com/pybind/pybind11/archive/refs/tags/v2.13.3.tar.gz
+        tar xzvf v2.13.3.tar.gz
+        cd pybind11-2.13.3/
         mkdir build
         cd build
         cmake -GNinja -DCMAKE_INSTALL_PREFIX=${INSTALL_DIR} -DPYBIND11_TEST=OFF ..
diff --git a/build-without-conan.md b/build-without-conan.md
index eab56f9e35..b7662542f0 100644
--- a/build-without-conan.md
+++ b/build-without-conan.md
@@ -119,9 +119,9 @@ cmake --install .
 
 ```
 cd ${TMP_DIR}
-wget https://github.com/pybind/pybind11/archive/refs/tags/v2.13.1.tar.gz
-tar xzvf v2.13.1.tar.gz
-cd pybind11-2.13.1/
+wget https://github.com/pybind/pybind11/archive/refs/tags/v2.13.3.tar.gz
+tar xzvf v2.13.3.tar.gz
+cd pybind11-2.13.3/
 mkdir build
 cd build
 cmake -DCMAKE_INSTALL_PREFIX=${INSTALL_DIR} -DPYBIND11_TEST=OFF ..
diff --git a/pytket/conanfile.py b/pytket/conanfile.py
index 6bc2dc7af3..d53148a268 100644
--- a/pytket/conanfile.py
+++ b/pytket/conanfile.py
@@ -40,6 +40,6 @@ def requirements(self):
         self.requires("tktokenswap/0.3.8@tket/stable")
         self.requires("symengine/0.12.0")
         self.requires("gmp/6.3.0")
-        self.requires("pybind11/2.13.1")
+        self.requires("pybind11/2.13.3")
         self.requires("nlohmann_json/3.11.3")
         self.requires("pybind11_json/0.2.14")
diff --git a/recipes/pybind11/conanfile.py b/recipes/pybind11/conanfile.py
index 3484785159..9b008a5b3d 100644
--- a/recipes/pybind11/conanfile.py
+++ b/recipes/pybind11/conanfile.py
@@ -21,7 +21,7 @@
 
 class PyBind11Conan(ConanFile):
     name = "pybind11"
-    version = "2.13.1"
+    version = "2.13.3"
     description = "Seamless operability between C++11 and Python"
     topics = "pybind11", "python", "binding"
     homepage = "https://github.com/pybind/pybind11"
diff --git a/recipes/pybind11_json/all/conanfile.py b/recipes/pybind11_json/all/conanfile.py
index 074287c71f..7fd00122e3 100644
--- a/recipes/pybind11_json/all/conanfile.py
+++ b/recipes/pybind11_json/all/conanfile.py
@@ -29,7 +29,7 @@ def package_id(self):
 
     def requirements(self):
         self.requires("nlohmann_json/3.11.3")
-        self.requires("pybind11/2.13.1")
+        self.requires("pybind11/2.13.3")
 
     def source(self):
         get(