diff --git a/source/compiler_stages/tc_1/code_to_write.rst b/source/compiler_stages/tc_1/code_to_write.rst
index 32d63d2c78b67fba82411ea98c731b5227a8af43..f1da5a4cb4454e4cfd2650e7d30148afc7ac1a03 100644
--- a/source/compiler_stages/tc_1/code_to_write.rst
+++ b/source/compiler_stages/tc_1/code_to_write.rst
@@ -9,10 +9,7 @@ Be sure to read Flex and Bison documentations and tutorials, see
 .. _GNU Bison's documentation: http://www.gnu.org/software/bison/manual/bison.html
 
 See the lecture notes, and read the C++ chapter of
-`GNU Bison's documentation`_.  Note that the version being used for the
-|Project| project may differ from the latest public release, thus
-students should build their own documentation
-by running :code:`make html` in the provided Bison tarball.
+`GNU Bison's documentation`_.
 
 .. _Complete C++ Example: http://www.gnu.org/software/bison/manual/bison.html#A-Complete-C_002b_002b-Example
 
diff --git a/source/tools/flex.rst b/source/tools/flex.rst
index 8312c1e96ec68d2c70d70e5e483dbad1f7b92ca8..9071b5c55e740813a2139ad91b50ff0b3d6a9cc7 100644
--- a/source/tools/flex.rst
+++ b/source/tools/flex.rst
@@ -3,12 +3,6 @@
 Flex & Bison
 ============
 
-We use `Bison 3.2.1.52-cd4f7
-<https://www.lrde.epita.fr/~tiger/download/bison-3.2.1.52-cd4f7.tar.gz>`_,
-that is able to produce a C++ parser combined with modern features such as
-GLR, variants and complete symbols.  If you don't use this Bison,
-you will be in trouble.
-
 The original papers on Lex and Yacc are:
 
 Johnson, Stephen C. [1975].