diff --git a/courses/CONTRIBUTING.md b/courses/CONTRIBUTING.md
index 4d629d2..97bb92e 100644
--- a/courses/CONTRIBUTING.md
+++ b/courses/CONTRIBUTING.md
@@ -16,7 +16,7 @@ Ensure that you adhere to the following guidelines:
 ### Building and testing locally
 Run the following commands to build and view the site locally before opening a PR.
 
-```bash
+```
 python3 -m venv .venv
 source .venv/bin/activate
 pip install -r requirements.txt
diff --git a/courses/big_data/evolution.md b/courses/big_data/evolution.md
index 281efa8..cb665b7 100644
--- a/courses/big_data/evolution.md
+++ b/courses/big_data/evolution.md
@@ -57,7 +57,7 @@
     ![Pig Example](images/pig_example.png)
 
     Output:
-    ```text
+    ```
     7,Komal,Nayak,24,9848022334,trivendram
     8,Bharathi,Nambiayar,24,9848022333,Chennai
     5,Trupthi,Mohanthy,23,9848022336,Bhuwaneshwar
@@ -70,7 +70,7 @@
     1. Presto is a high performance, distributed SQL query engine for Big Data.
     2. Its architecture allows users to query a variety of data sources such as Hadoop, AWS S3, Alluxio, MySQL, Cassandra, Kafka, and MongoDB.
     3. Example presto query:
-    ```sql
+    ```
     use studentDB;
     show tables;
     SELECT roll_no, name FROM studentDB.studentDetails where section=’A’ limit 5;
diff --git a/courses/databases_sql/lab.md b/courses/databases_sql/lab.md
index b6f7227..c946d41 100644
--- a/courses/databases_sql/lab.md
+++ b/courses/databases_sql/lab.md
@@ -10,7 +10,7 @@ Create a working directory named sos or something similar, and cd into it.
 Enter the following into a file named my.cnf under a directory named custom.
 
 
-```conf
+```
 sos $ cat custom/my.cnf
 [mysqld]
 # These settings apply to MySQL server
@@ -25,7 +25,7 @@ long_query_time=0.1
 Start a container and enable slow query log with the following:
 
 
-```bash
+```
 sos $ docker run --name db -v custom:/etc/mysql/conf.d -e MYSQL_ROOT_PASSWORD=realsecret -d mysql:8
 sos $ docker cp custom/mysqld.cnf $(docker ps -qf "name=db"):/etc/mysql/conf.d/custom.cnf
 sos $ docker restart $(docker ps -qf "name=db")
@@ -35,7 +35,7 @@ sos $ docker restart $(docker ps -qf "name=db")
 Import a sample database
 
 
-```bash
+```
 sos $ git clone git@github.com:datacharmer/test_db.git
 sos $ docker cp test_db $(docker ps -qf "name=db"):/home/test_db/
 sos $ docker exec -it $(docker ps -qf "name=db") bash
@@ -48,7 +48,7 @@ root@3ab5b18b0c7d:/etc# chown mysql:mysql /var/log/mysqlslow.log
 
 _Workshop 1: Run some sample queries_
 Run the following
-```bash
+```
 $ mysql -uroot -prealsecret mysql
 mysql>
 
@@ -92,7 +92,7 @@ mysql> select count(*) from employees where first_name = 'Sachin';
 ```
 
 _Workshop 2: Use explain and explain analyze to profile a query, identify and add indexes required for improving performance_
-```bash
+```
 # View all indexes on table 
 #(\G is to output horizontally, replace it with a ; to get table output)
 mysql> show index from employees from employees\G
@@ -178,7 +178,7 @@ mysql> explain analyze select first_name, last_name from employees where first_n
 ```
 
 _Workshop 3: Identify slow queries on a MySQL server_
-```bash
+```
 # Run the command below in two terminal tabs to open two shells into the container.
 docker exec -it $(docker ps -qf "name=db") bash
 
diff --git a/courses/linux_basics/command_line_basics.md b/courses/linux_basics/command_line_basics.md
index ca188eb..04b151c 100644
--- a/courses/linux_basics/command_line_basics.md
+++ b/courses/linux_basics/command_line_basics.md
@@ -135,7 +135,7 @@ the simplest use case of creating a new file.
 
 General syntax of using touch command
 
-```bash
+```
 touch <file_name>
 ```
 
@@ -148,7 +148,7 @@ to verify that the new directory is created.
 
 General syntax of using mkdir command
 
-```bash
+```
 mkdir <directory_name>
 ```
 
@@ -164,7 +164,7 @@ run this command with care.
 
 General syntax of using rm command:
 
-```bash
+```
 rm <file_name>
 ```
 
@@ -183,7 +183,7 @@ their copy both co-exist after running cp command successfully.
 
 General syntax of using cp command:
 
-```bash
+```
 cp <source_path> <destination_path>
 ```
 
@@ -218,7 +218,7 @@ move the files or directories, the original copy is lost.
 
 General syntax of using mv command:
 
-```bash
+```
 mv <source_path> <destination_path>
 ```
 
@@ -385,7 +385,7 @@ an input to the grep command.
 
 General syntax of using grep command:
 
-```bash
+```
 grep <word_to_search> <file_name>
 ```
 
@@ -401,7 +401,7 @@ file.
 
 General syntax of using the sed command for replacement:
 
-```bash
+```
 sed 's/<text_to_replace>/<replacement_text>/' <file_name>
 ```
 
diff --git a/courses/python_web/intro.md b/courses/python_web/intro.md
index 5710788..db1abf3 100644
--- a/courses/python_web/intro.md
+++ b/courses/python_web/intro.md
@@ -73,7 +73,7 @@ We know compilation is involved in all 3 languages we are discussing. Just that
 
 Those bytecodes are language specific. Python has its own set of bytecode defined (more in `dis` module) and so does java. So naturally, your operating system will not know how to run it. To run this bytecode, we have something called Virtual Machines. Ie: The JVM or the Python VM (CPython, Jython). These so called Virtual Machines are the programs which can read the bytecode and run it on a given operating system. Python has multiple VMs available. Cpython is a python VM implemented in C language, similarly Jython is a Java implementation of python VM. **At the end of the day, what they should be capable of is to understand python language syntax, be able to compile it to bytecode and be able to run that bytecode.** You can implement a python VM in any language! (And people do so, just because it can be done)
 
-```text
+```
                                                               The Operating System
 
                                                               +------------------------------------+
diff --git a/courses/python_web/python-concepts.md b/courses/python_web/python-concepts.md
index ca444ae..8a7062a 100644
--- a/courses/python_web/python-concepts.md
+++ b/courses/python_web/python-concepts.md
@@ -122,7 +122,7 @@ What goes inside the `deco` function might seem complex. Let's try to uncover it
 
 Let's visualize it for better understanding
 
-```text
+```
        BEFORE                   function_object (ID: 100)
 
        "hello_world"            +--------------------+
diff --git a/courses/python_web/python-web-flask.md b/courses/python_web/python-web-flask.md
index 8a6a151..c797830 100644
--- a/courses/python_web/python-web-flask.md
+++ b/courses/python_web/python-web-flask.md
@@ -36,7 +36,7 @@ b'GET / HTTP/1.1\r\nHost: localhost:65432\r\nConnection: keep-alive\r\nDNT: 1\r\
 
 Examine closely and the content will look like the HTTP protocol's format. ie:
 
-```text
+```
 HTTP_METHOD URI_PATH HTTP_VERSION
 HEADERS_SEPARATED_BY_SEPARATOR
 ```
diff --git a/courses/security/fundamentals.md b/courses/security/fundamentals.md
index 5228eb1..5c82e67 100644
--- a/courses/security/fundamentals.md
+++ b/courses/security/fundamentals.md
@@ -42,7 +42,7 @@
   - Fail securely
     - Applications regularly fail to process transactions for many reasons. How they fail can determine if an application is secure or not.
 
-    ```java
+    ```
 
     is_admin =  true;
     try {
@@ -113,7 +113,7 @@
 
 - Ciphers are the cornerstone of cryptography. A cipher is a set of algorithms that performs encryption or decryption on a message. An encryption algorithm (E) takes a secret key (k) and a message (m) and produces a ciphertext (c). Similarly, a Decryption algorithm (D) takes a secret key (K) and the previous resulting Ciphertext (C). They are represented as follows:
 
-```text
+```
 
 E(k,m) = c
 D(k,c) = m
@@ -122,7 +122,7 @@ D(k,c) = m
 
 - This also means that for it to be a cipher, it must satisfy the consistency equation as follows, making it possible to decrypt.
 
-```text
+```
 
 D(k,E(k,m)) = m
 ```
diff --git a/courses/security/network_security.md b/courses/security/network_security.md
index 366b185..2ddf2f6 100644
--- a/courses/security/network_security.md
+++ b/courses/security/network_security.md
@@ -142,7 +142,7 @@ Let us see how we keep a check on the perimeter i.e the edges, the first layer o
 - Nmap is often used to determine alive hosts in a network, open ports on those hosts, services running on those open ports, and version identification of that service on that port.
 - More at http://scanme.nmap.org/
 
-```bash
+```
 nmap [scan type] [options] [target specification]
 ```
 
@@ -417,7 +417,7 @@ TCP Flags
 
   - Abuse of the normal operation or settings of these flags can be used by attackers to launch DoS attacks. This causes network servers or web servers to crash or hang.
 
-```text
+```
 | SYN  | FIN  | PSH   | RST  | Validity|  
 |------|------|-------|------|---------|
 | 1    |1     |0      |0     |Illegal Combination
diff --git a/courses/security/threats_attacks_defences.md b/courses/security/threats_attacks_defences.md
index fbae0dc..145a17d 100644
--- a/courses/security/threats_attacks_defences.md
+++ b/courses/security/threats_attacks_defences.md
@@ -100,7 +100,7 @@ BGP Security
 - A successful exploit will allow attackers to access, modify, or delete information in the database.
 - It permits attackers to steal sensitive information stored within the backend databases of affected websites, which may include such things as user credentials, email addresses, personal information, and credit card numbers
 
-```sql
+```
 SELECT USERNAME,PASSWORD from USERS where USERNAME='<username>' AND PASSWORD='<password>';
 
 Here the username & password is the input provided by the user. Suppose an attacker gives the input as " OR '1'='1'" in both fields. Therefore the SQL query will look like:
diff --git a/mkdocs.yml b/mkdocs.yml
index 1454cf4..14710ed 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -76,9 +76,6 @@ nav:
 - Code of Conduct: CODE_OF_CONDUCT.md
 - SRE Community: sre_community.md
 copyright: "Copyright 2020 LinkedIn Corporation. All Rights Reserved. Licensed under the Creative Commons Attribution 4.0 International Public License"
-markdown_extensions:
-  - pymdownx.highlight
-  - pymdownx.superfences
 extra:
     social:
         - icon: fontawesome/brands/github