diff --git a/.travis.yml b/.travis.yml
index 2c5badb2e..a18ca2f2f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -19,7 +19,7 @@ before_install:
 #  - if [ $TRAVIS_OS_NAME == osx ]; then xcode-select --install ; fi
   - if [ $TRAVIS_OS_NAME == osx ]; then brew update ; fi
 #  - if [ $TRAVIS_OS_NAME == osx ]; then brew install qt55 openssl miniupnpc libmicrohttpd speex homebrew/science/opencv ffmpeg sqlcipher ; fi
-  - if [ $TRAVIS_OS_NAME == osx ]; then brew install qt55 openssl miniupnpc libmicrohttpd speex ffmpeg sqlcipher ; fi
+  - if [ $TRAVIS_OS_NAME == osx ]; then brew install qt55 openssl miniupnpc libmicrohttpd speex speexdsp ffmpeg sqlcipher ; fi
   - if [ $TRAVIS_OS_NAME == osx ]; then brew link --force qt55 ; fi
 #Fix for opencv and numpy already installed by system
   - if [ $TRAVIS_OS_NAME == osx ]; then rm '/usr/local/bin/f2py'; fi
diff --git a/MacOS_X_InstallGuide.md b/MacOS_X_InstallGuide.md
index f79d5fa0e..56bdb78c6 100644
--- a/MacOS_X_InstallGuide.md
+++ b/MacOS_X_InstallGuide.md
@@ -57,6 +57,7 @@ If you have error in linking, run this:
 For VOIP Plugin: 
 
        $brew install speex
+       $brew install speexdsp
        $brew install homebrew/science/opencv
        $brew install ffmpeg
 
diff --git a/README.md b/README.md
index 41597927b..2a7ebbdd0 100644
--- a/README.md
+++ b/README.md
@@ -44,7 +44,7 @@ Compilation on Linux
    * Arch Linux
    ```bash
    pacman -S base-devel libgnome-keyring libmicrohttpd libupnp libxslt \
-       libxss opencv qt4 speex sqlcipher
+       libxss opencv qt4 speex speexdsp sqlcipher
    ```
 
 2. Checkout the source code
diff --git a/WindowsMSys2_InstallGuide.md b/WindowsMSys2_InstallGuide.md
index c6782744d..06bfba022 100644
--- a/WindowsMSys2_InstallGuide.md
+++ b/WindowsMSys2_InstallGuide.md
@@ -37,7 +37,8 @@ Choose only w64-i686 if you want only compilation in 32b architecture.
        pacman -S mingw-w64-i686-miniupnpc mingw-w64-x86_64-miniupnpc  
        pacman -S mingw-w64-i686-sqlite3 mingw-w64-x86_64-sqlite3  
        pacman -S mingw-w64-i686-speex mingw-w64-x86_64-speex  
-       pacman -S mingw-w64-i686-opencv mingw-w64-x86_64-opencv  
+       pacman -S mingw-w64-i686-speexdsp mingw-w64-x86_64-speexdsp
+       pacman -S mingw-w64-i686-opencv mingw-w64-x86_64-opencv
        pacman -S mingw-w64-i686-ffmpeg mingw-w64-x86_64-ffmpeg  
        pacman -S mingw-w64-i686-libmicrohttpd mingw-w64-x86_64-libmicrohttpd  
        pacman -S mingw-w64-i686-libxslt mingw-w64-x86_64-libxslt  
diff --git a/appveyor.yml b/appveyor.yml
index 6a4a4111f..776ccdc6e 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -100,6 +100,7 @@ install:
   - C:\msys64\usr\bin\bash -lc "pacman --noconfirm -S mingw-w64-i686-miniupnpc mingw-w64-x86_64-miniupnpc"
   - C:\msys64\usr\bin\bash -lc "pacman --noconfirm -S mingw-w64-i686-sqlite3 mingw-w64-x86_64-sqlite3"
   - C:\msys64\usr\bin\bash -lc "pacman --noconfirm -S mingw-w64-i686-speex mingw-w64-x86_64-speex"
+  - C:\msys64\usr\bin\bash -lc "pacman --noconfirm -S mingw-w64-i686-speexdsp mingw-w64-x86_64-speexdsp"
   - C:\msys64\usr\bin\bash -lc "pacman --noconfirm -S mingw-w64-i686-opencv mingw-w64-x86_64-opencv"
   - C:\msys64\usr\bin\bash -lc "pacman --noconfirm -S mingw-w64-i686-ffmpeg mingw-w64-x86_64-ffmpeg"
   - C:\msys64\usr\bin\bash -lc "pacman --noconfirm -S mingw-w64-i686-libmicrohttpd mingw-w64-x86_64-libmicrohttpd"