Could not be resolved to an installable set of packages

[zainozzaini]

Hi, I got that message while updating composer with your package. The message also mention :
Your requirements could not be resolved to an installable set of packages.

Problem 1
- Can only install one of: cakephp/cakephp[2.4.10, 1.0.0].
- Can only install one of: cakephp/cakephp[2.4.5, 1.0.0].
- Can only install one of: cakephp/cakephp[2.4.6, 1.0.0].
- Can only install one of: cakephp/cakephp[2.4.7, 1.0.0].
- Can only install one of: cakephp/cakephp[2.4.8, 1.0.0].
- Can only install one of: cakephp/cakephp[2.4.9, 1.0.0].
- Can only install one of: cakephp/cakephp[2.4.x-dev, 1.0.0].
- Can only install one of: cakephp/cakephp[2.5.0, 1.0.0].
- Can only install one of: cakephp/cakephp[2.5.0-RC1, 1.0.0].
- Can only install one of: cakephp/cakephp[2.5.0-RC2, 1.0.0].
- Can only install one of: cakephp/cakephp[2.5.0-beta, 1.0.0].
- Can only install one of: cakephp/cakephp[2.5.1, 1.0.0].
- Can only install one of: cakephp/cakephp[2.5.2, 1.0.0].
- Can only install one of: cakephp/cakephp[2.6.x-dev, 1.0.0].
- lubos/google 1.0.1 requires lubos/cakephp-opauth ~1.0 -> no matching package found.
- lubos/google 1.0.0 requires lubos/cakephp-opauth ~1.0 -> no matching package found.
- Installation request for cakephp/cakephp 1.0.0 -> satisfiable by cakephp/cakephp[1.0.0].
- lubos/google 1.0.2 requires cakephp/cakephp ~2.0 -> satisfiable by cakephp/cakephp[2.4.10, 2.4.5, 2.4.6, 2.4.7, 2.4.8, 2.4.9, 2.4.x-dev, 2.5.0, 2.5.0-RC1, 2.5.0-RC2, 2.5.0-beta, 2.5.1, 2.5.2, 2.6.x-dev].
- Installation request for lubos/google 1.0.* -> satisfiable by lubos/google[1.0.0, 1.0.1, 1.0.2].

but my cake is 2.6 version already... Any missing step that i didnt do?Thanks...