diff --git a/sci-libs/libcifpp/libcifpp-9.0.5.ebuild b/sci-libs/libcifpp/libcifpp-9.0.5.ebuild
index f24d9e2d4b4dd..3b6bef616a5c1 100644
--- a/sci-libs/libcifpp/libcifpp-9.0.5.ebuild
+++ b/sci-libs/libcifpp/libcifpp-9.0.5.ebuild
@@ -20,7 +20,7 @@ IUSE="test"
 RESTRICT="!test? ( test )"
 
 DEPEND="
-	>=dev-cpp/eigen-3.4.0:3
+	>=dev-cpp/eigen-3.4.0:=
 	dev-libs/boost:=
 	dev-libs/libpcre2
 	virtual/zlib:=
diff --git a/sci-libs/libcifpp/libcifpp-9.0.6.ebuild b/sci-libs/libcifpp/libcifpp-9.0.6.ebuild
index aaa9c40bb793f..698339ff961e9 100644
--- a/sci-libs/libcifpp/libcifpp-9.0.6.ebuild
+++ b/sci-libs/libcifpp/libcifpp-9.0.6.ebuild
@@ -20,7 +20,7 @@ IUSE="test"
 RESTRICT="!test? ( test )"
 
 DEPEND="
-	>=dev-cpp/eigen-3.4.0:3
+	>=dev-cpp/eigen-3.4.0:=
 	dev-libs/boost:=
 	dev-libs/libpcre2
 	virtual/zlib:=