diff --git a/contrib/build-wine/prepare-wine.sh b/contrib/build-wine/prepare-wine.sh
index f13a6f228..ab2d41b5e 100755
--- a/contrib/build-wine/prepare-wine.sh
+++ b/contrib/build-wine/prepare-wine.sh
@@ -14,8 +14,8 @@ LIBUSB_URL=https://prdownloads.sourceforge.net/project/libusb/libusb-1.0/libusb-
 LIBUSB_SHA256=671f1a420757b4480e7fadc8313d6fb3cbb75ca00934c417c1efa6e77fb8779b
 
 PYINSTALLER_REPO="https://github.com/SomberNight/pyinstaller.git"
-PYINSTALLER_COMMIT=d1cdd726d6a9edc70150d5302453fb90fdd09bf2
-# ^ tag 3.4, plus a custom commit that fixes cross-compilation with MinGW
+PYINSTALLER_COMMIT=46fc8155710631f84ebe20e32e0a6ba6df76d366
+# ^ tag 3.5, plus a custom commit that fixes cross-compilation with MinGW
 
 PYTHON_VERSION=3.6.8
 
diff --git a/contrib/osx/make_osx b/contrib/osx/make_osx
index 0cd74d971..d16c9c1d1 100755
--- a/contrib/osx/make_osx
+++ b/contrib/osx/make_osx
@@ -59,7 +59,7 @@ python3 -m pip install -Ir ./contrib/deterministic-build/requirements-binaries.t
 
 
 info "Installing pyinstaller"
-python3 -m pip install -I --user pyinstaller==3.4 --no-use-pep517 || fail "Could not install pyinstaller"
+python3 -m pip install -I --user pyinstaller==3.5 || fail "Could not install pyinstaller"
 
 info "Using these versions for building $PACKAGE:"
 sw_vers