diff --git a/Makefile b/Makefile
index 11c4b54..9af4fcd 100644
--- a/Makefile
+++ b/Makefile
@@ -184,9 +184,11 @@ install_for_ubuntu:
 		sudo mv pandoc-crossref.1  /usr/local/man/man1 ; \
 	fi ; \
 	echo "which pandoc-crossref: `which pandoc-crossref`" ; \
-	echo "Installing other dependencies..." ; \
-	pip install --upgrade pip ; \
-	pip install -r requirements.txt ;
+	if [ ! -f requirements.txt ]; then \
+		echo "pip installing other dependencies..." ; \
+		pip install --upgrade pip ; \
+		pip install -r requirements.txt ;
+	fi ;
 	$(PRINT) "make $@ done."
 
 install_for_mac:
@@ -205,8 +207,8 @@ install_for_mac:
 	fi ; \
 	echo "which pdflatex: `which pdflatex`" ; \
 	if [ ! -f /usr/local/bin/pandoc ]; then \
-		wget https://github.com/jgm/pandoc/releases/download/2.13/pandoc-2.13-macOS.pkg ; \
 		echo "Installing pandoc..." ; \
+		wget https://github.com/jgm/pandoc/releases/download/2.13/pandoc-2.13-macOS.pkg ; \
 		sudo installer -pkg pandoc-2.13-macOS.pkg -target / ; \
 	fi ; \
 	echo "which pandoc: `which pandoc`" ; \
@@ -219,36 +221,42 @@ install_for_mac:
 		sudo chmod a+x /usr/local/bin/pandoc-crossref ; \
 	fi ; \
 	echo "which pandoc-crossref: `which pandoc-crossref`" ; \
-	echo "Installing other dependencies..." ; \
-	pip install --upgrade pip ; \
-	pip install -r requirements.txt ;
+	if [ ! -f requirements.txt ]; then \
+		echo "pip installing other dependencies..." ; \
+		pip install --upgrade pip ; \
+		pip install -r requirements.txt ;
+	fi ;
 	$(PRINT) "make $@ done."
 
 install_for_windows:
 	@echo "Installing for windows..." ; \
 	choco install wget ; \
-	wget https://mirror.ctan.org/systems/texlive/tlnet/install-tl-windows.exe ; \
-	./install-tl-windows.exe -gui text ; \
-	echo "which pdflatex: `which pdflatex`" ;
+	if [ ! -f /usr/local/bin/pdflatex ]; then \
+		echo "Installing texlive..." ; \
+		wget https://mirror.ctan.org/systems/texlive/tlnet/install-tl-windows.exe ; \
+		cmd /u /c "install-tl-windows.exe -no-gui" ; \
+	fi ; \
+	echo "which pdflatex: `which pdflatex`" ; \
+	if [ ! -f /usr/local/bin/pandoc ]; then \
+		echo "Installing pandoc..." ; \
+		wget https://github.com/jgm/pandoc/releases/download/2.13/pandoc-2.13-windows-x86_64.zip ; \
+		cmd /u /c "unzip pandoc-2.13-windows-x86_64.zip"
+		sudo installer -pkg pandoc-2.13-macOS.pkg -target / ; \
+	fi ; \
+	echo "which pandoc: `which pandoc`" ; \
+	pandoc --version ; \
+	if [ ! -f /usr/local/bin/pandoc-crossref ]; then \
+		echo "Installing pandoc-crossref..." ; \
+		wget -c https://github.com/lierdakil/pandoc-crossref/releases/download/v0.3.10.0a/pandoc-crossref-Windows.7z ; \
+		tar -xf pandoc-crossref-macOS.tar.xz ; \
+		sudo mv pandoc-crossref /usr/local/bin/ ; \
+		sudo chmod a+x /usr/local/bin/pandoc-crossref ; \
+	fi ; \
+	echo "which pandoc-crossref: `which pandoc-crossref`" ; \
+	if [ ! -f requirements.txt ]; then \
+		echo "pip installing other dependencies..." ; \
+		pip install --upgrade pip ; \
+		pip install -r requirements.txt ;
+	fi ;
 	$(PRINT) "make $@ done."
 
-#	if [ ! -f /usr/local/bin/pandoc ]; then \
-#		wget https://github.com/jgm/pandoc/releases/download/2.13/pandoc-2.13-windows-x86_64.zip ; \
-#		echo "Installing pandoc..." ; \
-#		sudo installer -pkg pandoc-2.13-macOS.pkg -target / ; \
-#	fi ; \
-#	echo "which pandoc: `which pandoc`" ; \
-#	pandoc --version ; \
-#	if [ ! -f /usr/local/bin/pandoc-crossref ]; then \
-#		echo "Installing pandoc-crossref..." ; \
-#		wget -c https://github.com/lierdakil/pandoc-crossref/releases/download/v0.3.10.0a/pandoc-crossref-Windows.7z ; \
-#		tar -xf pandoc-crossref-macOS.tar.xz ; \
-#		sudo mv pandoc-crossref /usr/local/bin/ ; \
-#		sudo chmod a+x /usr/local/bin/pandoc-crossref ; \
-#	fi ; \
-#	echo "which pandoc-crossref: `which pandoc-crossref`" ; \
-#	echo "Installing other dependencies..." ; \
-#	pip install --upgrade pip ; \
-#	pip install -r requirements.txt ;
-#	$(PRINT) "make $@ done."
-