diff --git a/OpenBoard.pro b/OpenBoard.pro
index dc9f6f23..ef132b74 100644
--- a/OpenBoard.pro
+++ b/OpenBoard.pro
@@ -1,7 +1,7 @@
 TARGET = "OpenBoard"
 TEMPLATE = app
 
-CONFIG += c++14
+CONFIG += c++17
 CONFIG -= flat
 CONFIG += debug_and_release \
           no_include_pwd
diff --git a/src/pdf/pdf.pri b/src/pdf/pdf.pri
index aeb09b5b..82b7bf50 100644
--- a/src/pdf/pdf.pri
+++ b/src/pdf/pdf.pri
@@ -1,5 +1,3 @@
-CONFIG += c++17
-
 HEADERS      += src/pdf/GraphicsPDFItem.h \
                 src/pdf/PDFRenderer.h \
                 src/pdf/UBWebPluginPDFWidget.h \
@@ -9,4 +7,4 @@ SOURCES      += src/pdf/GraphicsPDFItem.cpp \
                 src/pdf/PDFRenderer.cpp \
                 src/pdf/UBWebPluginPDFWidget.cpp \
                 src/pdf/XPDFRenderer.cpp
-                          
\ No newline at end of file
+