Set an explcit minimum version requirmeent for libsoup.

debian/control

@@ -6,7 +6,7 @@ Build-Depends: debhelper (>= 8),
  libgee-0.8-dev,
  libglib2.0-dev (>= 2.42.0),
  libgtk-3-dev (>= 3.14.0),
- libsoup2.4-dev,
+ libsoup2.4-dev (>= 2.48),
  libnotify-dev (>=0.7.5),
  libcanberra-dev (>= 0.28),
  libwebkitgtk-3.0-dev (>= 2.4),
@@ -33,7 +33,7 @@ Depends: ${shlibs:Depends}, ${misc:Depends},
  libgee-0.8-2,
  libglib2.0-0 (>= 2.42.0),
  libgtk-3-0 (>= 3.14.0),
- libsoup2.4-1,
+ libsoup2.4-1 (>= 2.48),
  libnotify4 (>= 0.7.5),
  libcanberra0 (>= 0.28),
  libwebkitgtk-3.0-0 (>= 2.4),

src/CMakeLists.txt

@@ -490,7 +490,7 @@ pkg_check_modules(DEPS REQUIRED
     glib-2.0>=${TARGET_GLIB}.0
     gio-2.0>=${TARGET_GLIB}.0
     gtk+-3.0>=3.14.0
-    libsoup-2.4
+    libsoup-2.4>=2.48
     gee-0.8>=0.8.5
     libnotify>=0.7.5
     libcanberra>=0.28