Fix headings in installation instructions

Change-Id: Ie3031f0b1f3ae4a467da1b0d8a404f8c5ad90df8
diff --git a/Readme.md b/Readme.md
index 418c2bb..b5a69fe 100644
--- a/Readme.md
+++ b/Readme.md
@@ -13,7 +13,7 @@
 via [rpy2](https://rpy2.github.io/). **Please note that with a native implementation the API might change.**
 
 ## Installation
-##### 1. Install  R
+#### 1. Install  R
 From [CRAN](https://cran.r-project.org/bin/) or, alternatively, on some recent Linux distributions: 
 
 ```shell script
@@ -24,11 +24,11 @@
 sudo yum install -y R R-devel libcurl-devel openssl-devel libxml2-devel libsodium-devel python3-pandas
 ```
 
-###### 2. Install the R package
+#### 2. Install the R package
 ```
 Rscript -e "install.packages('RKorAPClient')"
 ```
-###### 3. Install the Python package
+#### 3. Install the Python package
 ```
 python3 -m pip install git+https://github.com/KorAP/PythonKorAPClient
 ```