diff --git a/doc/CMakeLists.txt b/doc/CMakeLists.txt
index 57af432..1b0a909 100644
--- a/doc/CMakeLists.txt
+++ b/doc/CMakeLists.txt
@@ -9,6 +9,12 @@ endif()
 
 find_package(LATEX)
 
+# For Apple silicon, pyenchant (used by sphinxcontrib.spelling) may fail to find the enchant library.
+# https://github.com/pyenchant/pyenchant/issues/265
+find_library(ENCHANT_LIBRARIES
+  NAMES enchant-2
+  )
+
 add_subdirectory(en)
 add_subdirectory(jp)
 
diff --git a/doc/en/CMakeLists.txt b/doc/en/CMakeLists.txt
index 12ba5c3..27b896e 100644
--- a/doc/en/CMakeLists.txt
+++ b/doc/en/CMakeLists.txt
@@ -6,25 +6,40 @@ set(DSQSS_DOC_DIR share/dsqss/${DSQSS_VERSION}/doc/en)
 
 configure_file(${CMAKE_CURRENT_SOURCE_DIR}/conf.py ${CMAKE_CURRENT_BINARY_DIR})
 
+set(cmd_list
+  env PYTHONPATH="${pythonpath_build}:$ENV{PYTHONPATH}"
+  ${SPHINX_EXECUTABLE}
+  -b html
+  -d ${SPHINX_CACHE_DIR}
+  ${CMAKE_CURRENT_SOURCE_DIR}
+  ${SPHINX_HTML_DIR}
+)
+
+if(ENCHANT_LIBRARIES)
+  list(INSERT cmd_list 0 env PYENCHANT_LIBRARY_PATH=${ENCHANT_LIBRARIES})
+endif()
+
 add_custom_target(doc-en-html ALL
   COMMAND
-    env PYTHONPATH="${pythonpath_build}:$ENV{PYTHONPATH}"
-    ${SPHINX_EXECUTABLE}
-    -b html
-    -d ${SPHINX_CACHE_DIR}
-    ${CMAKE_CURRENT_SOURCE_DIR}
-    ${SPHINX_HTML_DIR}
+    ${cmd_list}
   )
 
 if(LATEX_FOUND)
-  add_custom_target(doc-en-pdf ALL
-    COMMAND
+  set(cmd_list
       env PYTHONPATH="${pythonpath_build}:$ENV{PYTHONPATH}"
+      ${ENC_ENV}
       ${SPHINX_EXECUTABLE}
       -b latex
       -d ${SPHINX_CACHE_DIR}
       ${CMAKE_CURRENT_SOURCE_DIR}
       ${SPHINX_PDF_DIR}
+      )
+  if(ENCHANT_LIBRARIES)
+    list(INSERT cmd_list 0 env PYENCHANT_LIBRARY_PATH=${ENCHANT_LIBRARIES})
+  endif()
+  add_custom_target(doc-en-pdf ALL
+    COMMAND
+      ${cmd_list}
     COMMAND
       cd pdf && make
     )
diff --git a/doc/jp/CMakeLists.txt b/doc/jp/CMakeLists.txt
index 4798d32..a457194 100644
--- a/doc/jp/CMakeLists.txt
+++ b/doc/jp/CMakeLists.txt
@@ -6,25 +6,42 @@ set(DSQSS_DOC_DIR_JP share/dsqss/${DSQSS_VERSION}/doc/jp)
 
 configure_file(${CMAKE_CURRENT_SOURCE_DIR}/conf.py ${CMAKE_CURRENT_BINARY_DIR})
 
+set(cmd_list
+  env PYTHONPATH="${pythonpath_build}:$ENV{PYTHONPATH}"
+  ${SPHINX_EXECUTABLE}
+  -b html
+  -d ${SPHINX_CACHE_DIR}
+  ${CMAKE_CURRENT_SOURCE_DIR}
+  ${SPHINX_HTML_DIR}
+)
+
+if(ENCHANT_LIBRARIES)
+  list(INSERT cmd_list 0 env PYENCHANT_LIBRARY_PATH=${ENCHANT_LIBRARIES})
+endif()
+
 add_custom_target(doc-jp-html ALL
   COMMAND
-    env PYTHONPATH="${pythonpath_build}:$ENV{PYTHONPATH}"
-    ${SPHINX_EXECUTABLE}
-    -b html
-    -d ${SPHINX_CACHE_DIR}
-    ${CMAKE_CURRENT_SOURCE_DIR}
-    ${SPHINX_HTML_DIR}
+  ${cmd_list}
   )
 
 if(LATEX_FOUND)
-  add_custom_target(doc-jp-pdf ALL
-    COMMAND
+
+  set(cmd_list
       env PYTHONPATH="${pythonpath_build}:$ENV{PYTHONPATH}"
+      ${ENC_ENV}
       ${SPHINX_EXECUTABLE}
       -b latex
       -d ${SPHINX_CACHE_DIR}
       ${CMAKE_CURRENT_SOURCE_DIR}
       ${SPHINX_PDF_DIR}
+      )
+  if(ENCHANT_LIBRARIES)
+    list(INSERT cmd_list 0 env PYENCHANT_LIBRARY_PATH=${ENCHANT_LIBRARIES})
+  endif()
+
+  add_custom_target(doc-jp-pdf ALL
+    COMMAND
+      ${cmd_list}
     COMMAND
       cd pdf && make
     )