diff --git a/source/conf.py b/source/conf.py
index 0143e75b..d48e3c48 100644
--- a/source/conf.py
+++ b/source/conf.py
@@ -418,6 +418,8 @@ def make_ref(ref_str, ref_view, ref_sufix):
 primary_domain = "cpp"
 
 
+highlight_language = "cpp"
+
 # -- Options for spelling extension -------------------------------------------
 
 spelling_show_suggestions = True
diff --git a/source/iface/async_handler.rst b/source/iface/async_handler.rst
index 04278ecf..347e9b5f 100644
--- a/source/iface/async_handler.rst
+++ b/source/iface/async_handler.rst
@@ -78,4 +78,5 @@ function and passing it to the :ref:`queue`.
 Output:
 
 .. literalinclude:: /examples/async-handler.out
+   :language: none
    :lines: 5-
diff --git a/source/iface/atomic_ref.rst b/source/iface/atomic_ref.rst
index f77e632a..4b023244 100644
--- a/source/iface/atomic_ref.rst
+++ b/source/iface/atomic_ref.rst
@@ -682,5 +682,6 @@ Examples
    :caption: Thread-safe push/pop using atomic operations.
 
 .. literalinclude:: /examples/atomic.out
+   :language: none
    :lines: 5-
    :caption: Output.
diff --git a/source/iface/buffer.rst b/source/iface/buffer.rst
index 2106e108..3a581106 100644
--- a/source/iface/buffer.rst
+++ b/source/iface/buffer.rst
@@ -964,4 +964,5 @@ An example of creating sub-buffers from a parent buffer:
 Output:
 
 .. literalinclude:: /examples/creating-sub-buffers.out
+   :language: none
    :lines: 5-
diff --git a/source/iface/command-group-handler.rst b/source/iface/command-group-handler.rst
index 5b3bfc0f..4d3591bb 100644
--- a/source/iface/command-group-handler.rst
+++ b/source/iface/command-group-handler.rst
@@ -1053,6 +1053,7 @@ described in :ref:`host_task-basic` chapter.
 Output:
 
 .. literalinclude:: /examples/host-task.out
+   :language: none
    :lines: 5-
 
 .. _handler-example2:
@@ -1075,4 +1076,5 @@ buffer on the device unchanged.
 Output:
 
 .. literalinclude:: /examples/handler-copy.out
+   :language: none
    :lines: 5-
diff --git a/source/iface/context.rst b/source/iface/context.rst
index 3d995cc2..27335105 100644
--- a/source/iface/context.rst
+++ b/source/iface/context.rst
@@ -301,4 +301,5 @@ Print out all the devices within a context.
 Potential Output:
 
 .. literalinclude:: /examples/context.out
+   :language: none
    :lines: 5-
diff --git a/source/iface/defining-kernels.rst b/source/iface/defining-kernels.rst
index c48e3256..85e08e44 100644
--- a/source/iface/defining-kernels.rst
+++ b/source/iface/defining-kernels.rst
@@ -61,6 +61,7 @@ number.
 Possible output:
 
 .. literalinclude:: /examples/def_kernels_named_function_obj.out
+  :language: none
   :lines: 5-
 
 The random number is generated during the construction
diff --git a/source/iface/device-selector.rst b/source/iface/device-selector.rst
index d178badc..509fa42e 100644
--- a/source/iface/device-selector.rst
+++ b/source/iface/device-selector.rst
@@ -109,4 +109,5 @@ Example 1
 Output on a system without a GPU:
 
 .. literalinclude:: /examples/gpu-selector.out
+   :language: none
    :lines: 5-
diff --git a/source/iface/device.rst b/source/iface/device.rst
index 61871c2e..536a1433 100644
--- a/source/iface/device.rst
+++ b/source/iface/device.rst
@@ -1627,4 +1627,5 @@ Enumerate the GPU devices.
 Output example:
 
 .. literalinclude:: /examples/get_devices.out
+   :language: none
    :lines: 5-
diff --git a/source/iface/event.rst b/source/iface/event.rst
index a191faf0..0ce0c4df 100644
--- a/source/iface/event.rst
+++ b/source/iface/event.rst
@@ -369,4 +369,5 @@ event profiling info.
 Output example:
 
 .. literalinclude:: /examples/event-elapsed-time.out
+   :language: none
    :lines: 5-
diff --git a/source/iface/exception.rst b/source/iface/exception.rst
index c1bc3e89..d78986c9 100644
--- a/source/iface/exception.rst
+++ b/source/iface/exception.rst
@@ -381,4 +381,5 @@ Catching asynchronous exceptions for incorrect range construction.
 Output:
 
 .. literalinclude:: /examples/exception-handling.out
+   :language: none
    :lines: 5-
diff --git a/source/iface/group-algorithms-library.rst b/source/iface/group-algorithms-library.rst
index ffa9f821..2de9c50f 100644
--- a/source/iface/group-algorithms-library.rst
+++ b/source/iface/group-algorithms-library.rst
@@ -678,5 +678,6 @@ Example
    :caption: Using the group algorithms library to perform a work-group reduce.
 
 .. literalinclude:: /examples/reduce-alg-lib.out
+   :language: none
    :lines: 5-
    :caption: Output.
diff --git a/source/iface/platform.rst b/source/iface/platform.rst
index 3edc0768..31d9298b 100644
--- a/source/iface/platform.rst
+++ b/source/iface/platform.rst
@@ -224,4 +224,5 @@ Enumerate the platforms and the devices they contain.
 Output:
 
 .. literalinclude:: /examples/get-platforms.out
+   :language: none
    :lines: 5-
diff --git a/source/iface/private_memory.rst b/source/iface/private_memory.rst
index a07b15b7..db23b35e 100644
--- a/source/iface/private_memory.rst
+++ b/source/iface/private_memory.rst
@@ -102,4 +102,5 @@ Example of usage of the ``sycl::private_memory``:
 Output example:
 
 .. literalinclude:: /examples/private_memory_example.out
+   :language: none
    :lines: 5-
diff --git a/source/iface/queue.rst b/source/iface/queue.rst
index 7558af20..51cba2dc 100644
--- a/source/iface/queue.rst
+++ b/source/iface/queue.rst
@@ -630,6 +630,7 @@ Submission of a single task SYCL kernel function.
 Output:
 
 .. literalinclude:: /examples/queue-single-task.out
+   :language: none
    :lines: 5-
 
 .. _queue-example-2:
@@ -647,4 +648,5 @@ Submission of a parallel SYCL kernel function.
 Output:
 
 .. literalinclude:: /examples/queue-parallel.out
+   :language: none
    :lines: 5-
diff --git a/source/iface/specialization-constants.rst b/source/iface/specialization-constants.rst
index be963f8e..d1553f50 100644
--- a/source/iface/specialization-constants.rst
+++ b/source/iface/specialization-constants.rst
@@ -265,4 +265,5 @@ specialization constants to set the values of the coefficients.
 Output:
 
 .. literalinclude:: /examples/specialization-constants.out
+   :language: none
    :lines: 5-
diff --git a/source/iface/stream.rst b/source/iface/stream.rst
index aff33b51..6b68b9f4 100644
--- a/source/iface/stream.rst
+++ b/source/iface/stream.rst
@@ -231,4 +231,5 @@ Output text to the console in a kernel.
 Output:
 
 .. literalinclude:: /examples/stream.out
+   :language: none
    :lines: 5-
diff --git a/source/iface/usm_allocations.rst b/source/iface/usm_allocations.rst
index 1c5c750f..96825a74 100644
--- a/source/iface/usm_allocations.rst
+++ b/source/iface/usm_allocations.rst
@@ -436,6 +436,7 @@ See :ref:`usm-implicit-data-movement` for usage.
 Output:
 
 .. literalinclude:: /examples/std-vector.out
+   :language: none
    :lines: 5-
 
 .. _usm-implicit-data-movement:
@@ -458,4 +459,5 @@ by the host code, all without programmer intervention.
 Output:
 
 .. literalinclude:: /examples/usm-implicit-data-movement.out
+   :language: none
    :lines: 5-
diff --git a/source/iface/vector-types.rst b/source/iface/vector-types.rst
index cafadbdf..a149df25 100644
--- a/source/iface/vector-types.rst
+++ b/source/iface/vector-types.rst
@@ -1023,7 +1023,7 @@ stored in memory sequentially and contiguously and are aligned to
 the size of the element type in bytes multiplied by the number
 of elements:
 
-::
+.. code-block:: none
 
   sizeof(DataT)⋅NumElements
 
@@ -1031,7 +1031,7 @@ The exception to this is when the number of element is three in which
 case the SYCL ``sycl::vec`` is aligned to the size of the element type in
 bytes multiplied by four:
 
-::
+.. code-block:: none
 
   sizeof(DataT)⋅4